US3914752A - Pump alarm system - Google Patents

Pump alarm system Download PDF

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Publication number
US3914752A
US3914752A US367021A US36702173A US3914752A US 3914752 A US3914752 A US 3914752A US 367021 A US367021 A US 367021A US 36702173 A US36702173 A US 36702173A US 3914752 A US3914752 A US 3914752A
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US
United States
Prior art keywords
packing
pump
plunger
detector member
alarm indicator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US367021A
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English (en)
Inventor
Willis W Howard
William C Maurer
Everett H Lock
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ExxonMobil Upstream Research Co
Original Assignee
Exxon Production Research Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Exxon Production Research Co filed Critical Exxon Production Research Co
Priority to US367021A priority Critical patent/US3914752A/en
Priority to GB1881674A priority patent/GB1433689A/en
Priority to AU68432/74A priority patent/AU487693B2/en
Priority to CA199,258A priority patent/CA1036239A/en
Publication of USB367021I5 publication Critical patent/USB367021I5/en
Application granted granted Critical
Publication of US3914752A publication Critical patent/US3914752A/en
Priority to AU29355/77A priority patent/AU2935577A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/002—Sealings comprising at least two sealings in succession
    • F16J15/008—Sealings comprising at least two sealings in succession with provision to put out of action at least one sealing; One sealing sealing only on standstill; Emergency or servicing sealings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/10—Other safety measures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • F04B53/162—Adaptations of cylinders
    • F04B53/164—Stoffing boxes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2201/00—Pump parameters
    • F04B2201/02—Piston parameters
    • F04B2201/0208—Leakage across the piston

Definitions

  • An alarm system for a high pressure reciprocating pump includes a detector member positioned adjacent the pump packing for detecting leakage of fluid therepast, and an alarm indicator responsive to movement of the detector member for operating an audible or visual alarm device or for stopping the pump.
  • the present invention relates to an apparatus for the detection of leakage past packing employed in a reciprocating pump. In one aspect it relates to an alarm system for a high pressure plunger pump.
  • the purpose of the present invention is to provide an apparatus that is capable of detecting incipient leakage of fluid past pump packing.
  • the effectiveness of the invention relies to a large extent on the fact that the onset of packing failure can be detected several minutes prior to complete failure of the packing.
  • the operating characteristics of a reciprocating pump are such that the pressure differential across the pump packing fluctuates from a minimum value on the suction stroke of the plunger to a maximum value on the power stroke (pumping stroke) of the plunger. It has been discovered that the initial evidence of packing failure occurs as a high velocity jet or spurt through the packing. The high velocity jet is of short duration and frequently occurs on a single pumping stroke of the plunger.
  • the apparatus of the present invention permits the early detection of packing failure thereby enabling replacement of the packing before any of the pump parts have become damaged.
  • the apparatus includes a detector member positioned adjacent the pump packing for detecting the leakage of fluid therepast, and an alarm indicator responsive to actuation of the detector member for operating an audible or visual alarm device or stopping the pump.
  • the alarm system of the present invention is used in conjunction with a tandem packing arrangement wherein the plunger packing is provided with two packings separated by a vent port.
  • the inner packing provides the plunger seal and the outer packing remains in reserve.
  • the outer packing is actuated after failure of the inner packing by merely closing the vent port permitting the pump to be operated through a second stage.
  • the detector member in such an arrangement is positioned opposite the vent port. Packing leakage discharges as a high velocity jet from the vent port striking the detector member and actuating the alarm system. This notifies the operator that the initial packing has failed.
  • the reserve packing can then be actuated by closing the vent port.
  • the alarm system may include a control for automatically closing the vent port upon actuation of the detector member.
  • FIG. 1 is a longitudinal sectional view of a portion of a reciprocating pump provided with a leak detecting member of the alarm system of the present invention. Portions of the pump are schematically illustrated.
  • FIG. 2 is a transverse sectional view of the apparatus shown in FIG. 1 with the cutting plane taken through line 22 .thereof.
  • FIG. 3 is a wiring diagram of the alarm system capable of use in the present invention.
  • the alarm system of the present invention may be used in any of the high pressure reciprocating pumps including symplex or multiplex, single acting or double acting pumps. Its preferred application, as described in this preferred embodiment, however, is in connection with high pressure, multiplex plunger pumps.
  • the fluid end of a plunger pump comprises separate steel forgings which include fluid end housing 10 mounted on a pump frame 11 and a crossbore body, shown partially as 12 coupled to the housing 10.
  • the crossbore body 12 can be similar in structure as that disclosed in U.S. Pat. No. 3,801,234, entitled Fluid End for Plunger Pump", dated Apr. 2, 1974. Other structures including a monoblock structure may also be employed.
  • the housing has formed therein a cylindrical bore 13 which is in fluid communication with the flow passages with the crossbore body 12.
  • a plunger 14 is mounted for reciprocation in the bore 13. The plunger 14 extends beyond the rear extremity of the housing 10 and is connected to the power end of the pump (not shown) by a drive rod 15.
  • Coupling 16 attaches the forward end of the drive rod to the rear end of plunger 14.
  • the power end of the pump which may be provided by hydraulic power or crankshaft drive moves the plunger 14 through a suction stroke and a power stroke.
  • On the suction stroke fluid is drawn into the crossbore body and bore 13 and on the power stroke fluid is discharged at a high pressure from the crossbore body.
  • the fluid is normally received at a pressure between about 50 to 100 psi and discharged at pressures up to 20,000 psi. It is thus seen that the pres sure within the fluid end housing 10 fluctuates within wide limits.
  • a packing indicated generally as 17 is provided near the rear end of housing 10.
  • the packing 17 in this preferred embodiment is shown in FIG. 1 as being a cartridge 18.
  • the alarm system of the present invention may also be employed in pumps equipped with conventional stuffing box assemblies.
  • the cartridge 18 which may take the form of a ho]- low cylindrical sleeve 20 is detachably mounted in a complementary shaped recessed end portion of a housing 10.
  • the forward transverse surface 21 of the cartridge 18 abuts internal shoulder 22 of the housing 10 and an O-ring 23 provides a pressure seal at this joint.
  • a peripheral portion of sleeve 20 is threaded for mating with internal threads formed in the mouth of the housing recess.
  • Other fasteners in lieu of the threaded connection may be employed for attaching the sleeve to the rear end of housing 10. These include clamping collars, flange connections, and the like.
  • the sleeve 20 is machined to provide a central annular support member 24 flanked by enlarged sections sized to receive the packing assemblies described below.
  • the opening 25 through support 24 permits free movement of plunger 14.
  • the plunger packing contained within sleeve 20 is a tandem packing arrangement which comprises inner and outer packings 17a and 17b, respectively, adapted to operate in staged sequence.
  • the inner packing assembly 17a includes a plurality of seal rings 26 which, as illustrated, may be nested V-rings 26 or similar liptype rings, ring adapter 27, lantern ring 28, spring 29, and spring adapters 30 and 31.
  • the outer packing assembly 17b may include nested V-rings 32, ring adapter 33, a lantern ring 34, a spring 35, and spring adapter 36.
  • the lantern rings 28 and 34 of assemblies 17a and 17b each fits between two of the V- rings and is positioned within its respective chamber to communicate with a passage for delivering lubricant to the interior of sleeve 20.
  • Passage 36 extends from an outer exposed portion of sleeve 20 to the interior of the packing in fluid communication with lantern ring 28 of packing assembly 17a.
  • passage 37 extends from an exposed portion of the sleeve 20 and is in fluid communication with lantern ring 34 of packing assembly 17b.
  • Passages 36 and 37 are schematically illustrated in FIG. 1.
  • the reserve packing 17b is also retained within sleeve 20 but spaced longitudinally to the rear of packing 17a.
  • Bushing 38 which is threadedly connected to the outer end of sleeve 20 closes the rear extremity of the annular space between the sleeve 20 and plunger 14 and serves to maintain the reserve packing 17b in place.
  • the spring 35 interposed between support 24 and retainer 36 urges the packing rings against the bushing 38 thereby maintaining the rings in tightly packed relationship.
  • a third passage formed in the sleeve 20 and designated by reference numeral 39 extends from an exposed portion of the sleeve 20 to the interior thereof at a point between packings 17a and 17b. Passage 39 which serves as the vent port is initially opened so that there is no differential pressure across the reserve packing 17b. Under this condition, the inner packing 17a provides the plunger seal during the initial stage of operation. The reserve packing 17b is not subjected to severe wear because the hydraulic loading is borne by the support member 24. The differential pressure across the inner packing is substantially equal to the pumping pressure.
  • this passage can be closed by the use of a valve, shown as 40, or by a plug (not shown). Closing of passage 39 activates the reserve packing 17b since the hydraulic pressure in the space separating the packings will be substantially equal to the pumping pressure. The pump then can be operated through a second stage wherein the reserve packing 17b provides the plunger seal.
  • lubricant will be delivered under pressure to the inner packing 17a through passage 36.
  • Lubricant enters the interior sleeve 20, passes through radial openings in the lantern ring 28, and into contact with plunger 14.
  • the seal rings to the rear of the lantern ring 28 insures that the lubricant flows forwardly which usually occurs on the suction stroke of the plunger 14. If external lubrication is provided on the plunger 14, the lantern ring 34 of the reserve packing assembly 24 need not be provided in that assembly.
  • the apparatus of the present invention which is employed to detect the incipient failure of the packing 17, may be used with any type of plunger packing but is particularly suited for use in connection with the tandem packing arrangement described in this preferred embodiment.
  • the alarm system of the present invention includes a detector member 42 disposed in the immediate vicinity of packing 17 and actuably responsive to movement of the detector member for indicating packing failure.
  • the detector member 42 should be positioned in confronting relation to any point of possible packing failure.
  • the detector member 42 should be positioned opposite the mouth of passage 39.
  • member 42 In order to detect this failure, member 42 should be positioned in surrounding relation to the plunger 14 and a short distance to the rear of bushing 38.
  • a fourth passage 43 is formed in the sleeve 20 and discharges rearwardly. Passage 43 communicates with a circumferentially extending space 44 between housing and the outer periphery of sleeve 20.
  • the detector member 42 moves in response to the high velocity fluid jet striking it rearwardly and actuates a switch in an alarm system circuit.
  • the closing of this circuit operates an audible indicator such as a siren and/or a visual indicator such as a light.
  • the alarm circuit may be connected through a suitable relay to the pump motor to stop the pump upon packing failure.
  • the alarm circuit in this embodiment is an open loop control circuit comprising a battery 51, a limit switch 52 actuable by the movement of the detector member 42, relays 53 and 54, and visual and audible indicators 55 and 56.
  • the system may also include relay 57 which can be electrically connected to the pump motor controls. Power to relay 57 which will result from actuation of the alarm system can be employed to open the circuit to the pump motor and thus stop the pump before excessive damage occurs.
  • the detector member 42 can take a variety of forms and shapes and can be actuated by impact, temperature, pressure, or contact of fluid. It can be incorporated in a pneumatic, mechanical or electrical system or combinations of these.
  • the detector member is provided by a flat-faced member adapted to move in response to a fluid jet striking it. Movement of the member 42 actuates a limit switch to close an electric circuit to the alarm indicator.
  • the member 42 comprises a flat-faced U-shaped member 58 made of thin sheet metal and a closure member pivotally mounted to the outer end of one leg of the U-member 58.
  • reinforcement rib 60 provided by steel tubing extend around the inner edge of the U-member 58 and is tack welded to the back side thereof.
  • the lower edge of the closure member is provided with a flange 62 which is urged into engagement with one leg of the U-member by spring 61.
  • the upper edge of the closure member 59 is curved to conform generally to the curvature of the plunger 14.
  • the inner curvature of the U-member 58 and the curved portion of the closure member 59 define generally a circle which is slightly larger in diameter than the plunger 14.
  • the clearance between the detector member 42 and the plunger 14 should be sufficient to permit free movement of the latter but should be close enough to detect the initial spurt of fluid jet from any one of the points of failure. For a 4-inch plunger, a clearance of about one-fourth inch is satisfactory.
  • the detector member 42 includes a rod 63, the lower end of which is connected to the upper extreme end of a reinforcing rib 60. The upper end of rod 63 is fastened to a shaft of a rotary type limit switch 52 by clamp 65. As best seen in FIG. 2, the switch 52 is attached to the pump frame 1 1 by a clamp 66 or other device such as a magnet.
  • the actuator 42 is suspended from the switch 52 and maintained in the deactivated (free) position when no external force is applied to the detector 42.
  • the detector 42 may be adjusted relative to the plunger 14 by first placing the detector around plunger 14 (this requires opening closure member 59 to broken line position of FIG. 2), sliding the rod 63 through collar 65 until the detector 42 and plunger 14 are concentric and tightening the set screw on-collar 65.
  • This assembly then can be adjusted relative to packing 17 by loosening clamp 66, moving it and the assembly supported thereon along the wall of frame 11 until actuator 42 is located about one inch to the rear of packing 17, then tightening clamp 66.
  • the following example illustrates the reliability of the alarm system constructed according to the present invention.
  • a triplex pump containing 3 /2 inch plungers operating at 10,000 psi and 142 strokes per minute had experienced several packing failures. Packing failures were detected in many instances only after the pump plunger, sleeve, or pump housing had been damaged by the complete failure of the packing. Because of high operating pressures, safety precautions precluded operators from visually inspecting the packing with pump operating at normal pressures (about 10,000 psi). Moreover, the high noise area in which the pump was operating made it extremely difficult to detect early packing failure. As a result of these conditions, packing failure was frequently detected only after the pump or pump parts were damaged by high velocity leakage escaping past the plunger packing.
  • An alarm system constructed according to the present invention was mounted around each of the three plungers of the triplex pump.
  • Each detector had the following dimensions:
  • Each detector 42 was positioned about 1 /2 inches to the rear of its associated packing 17.
  • the limit switch required 6 from the free position to close its contacts. This required only l-inch movement of the detector 42 to close switch 52.
  • the alarm system described above was designed to operate as follows.
  • the impact of fluid jetting through a point of packing failure moves detector 42 rearwardly.closing switch 52 which energizes the coil of relay 53. This closes contacts of the relay S3 energizing the coil of relay 54.
  • the contacts of relay 54 are closed operating the siren and the light. Following the initial spurt, detector 42 may return to its home position opening switch 52. The contacts of relay 54 however remain closed.
  • the alarm can be shut off by opening manual switch 70.
  • the present invention broadly contemplates the combination of a detector for detecting the discharge of fluid past the pump packing, and an indicator responsive to the detector.
  • a detector for detecting the discharge of fluid past the pump packing
  • an indicator responsive to the detector.
  • an apparatus for detecting the initial failure of said packing which comprises a detector member positioned adjacent to a point of packing failure and being actuated by impact of fluid discharging from said point of packing failure; and alarm indicator; and means for operating said alarm indicator upon actuation of said detector member.
  • said alarm indicator is an electrically operated device
  • said means for actuating said alarm indicator includes an open loop electric circuit including said alarm indicator and an electric switch for closing said electric circuit, said switch being closed by movement of said member to said second position.
  • an alarm system for detecting failure of said packing which comprises: a detector member substantially surrounding said plunger at a location to the rear of and externally of said packing, said detector member being sufficiently close to said packing to be movable by the discharge of fluid therepast; an alarm indicator; and means responsive to movement of said detector member for actuating said alarm indicator.
  • an apparatus for detecting the initial failure of said inner packing which comprises a detector member for detecting flow of fluid through said vent passage, said detector being actuable by impingement of fluid flowing through said vent passage; an alarm indicator; and means responsive to actuation of said detector member for operating said alarm indicator.
  • alarm indicator includes means for stopping the operation of said pump.
  • An alarm system for detecting incipient leakage of fluid past the plunger packing of a plunger pump which comprises: a detector member adapted to be positioned substantially around the pump plunger and to the rear of the plunger packing, said detector member being movable by high velocity fluid leakage through the plunger packing; and an alarm circuit including an indicator and a switch for actuating said indicator, said switch being movable to an activated position in response to movement of said detector member.
  • An alarm system for detecting and indicating failure of plunger packing for a plunger pump which comprises: a detector member for detecting high velocity leakage of fluid past said packing; said member being movable by the impact of said high velocity leakage past said packing; means for indicating packing failure; and means responsive to movement of said detector member by impact of said high velocity leakage for actuating said indicating means.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Reciprocating Pumps (AREA)
US367021A 1973-06-04 1973-06-04 Pump alarm system Expired - Lifetime US3914752A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US367021A US3914752A (en) 1973-06-04 1973-06-04 Pump alarm system
GB1881674A GB1433689A (en) 1973-06-04 1974-04-30 Pump alarm system
AU68432/74A AU487693B2 (en) 1973-06-04 1974-05-01 Pump alarm system
CA199,258A CA1036239A (en) 1973-06-04 1974-05-08 Pump packing failure alarm system
AU29355/77A AU2935577A (en) 1973-06-04 1977-10-04 Slurrifying particulate material using nozzles and stream deflectors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US367021A US3914752A (en) 1973-06-04 1973-06-04 Pump alarm system

Publications (2)

Publication Number Publication Date
USB367021I5 USB367021I5 (en, 2012) 1975-01-28
US3914752A true US3914752A (en) 1975-10-21

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US367021A Expired - Lifetime US3914752A (en) 1973-06-04 1973-06-04 Pump alarm system

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CA (1) CA1036239A (en, 2012)
GB (1) GB1433689A (en, 2012)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4135859A (en) * 1975-07-30 1979-01-23 J. M. Huber Corporation Pollution control device adapted for attachment to reservoir gland stuffing boxes
US4178133A (en) * 1977-04-14 1979-12-11 Binks Manufacturing Company Double-acting flexible tube pump
US4444545A (en) * 1982-04-08 1984-04-24 Sanders David F Pump control system
US4535326A (en) * 1982-07-21 1985-08-13 Joy Manufacturing Company Liner deterioration warning for fluid movers
US4576553A (en) * 1980-12-22 1986-03-18 Black & Decker Inc. Painting applicator with remote supply
US4878815A (en) * 1988-05-18 1989-11-07 Stachowiak J Edward High pressure reciprocating pump apparatus
DE3931544A1 (de) * 1988-09-21 1990-03-22 Hitachi Ltd Tauchkolbenpumpe
US4916938A (en) * 1988-08-25 1990-04-17 Atomic Energy Of Canada Limited Valve leakage inspection, testing and maintenance process
US5088385A (en) * 1991-02-19 1992-02-18 Westinghouse Electric Corp. Actuator apparatus with secondary seal motion
US5174722A (en) * 1991-08-09 1992-12-29 Bomar Corporation Safety shutdown circuit for pneumatic pump system
US5217235A (en) * 1991-04-25 1993-06-08 James Howden & Co. Ltd. Seal assembly
US5246235A (en) * 1992-02-25 1993-09-21 Ralph Heinzen Seal with embedded wire
US5628516A (en) * 1994-08-29 1997-05-13 Grenke; Edward Sealing assembly for rotary oil pumps having means for leaks detection and method of using same
US6082737A (en) * 1997-08-20 2000-07-04 John Crane Inc. Rotary shaft monitoring seal system
US20040075218A1 (en) * 1998-06-03 2004-04-22 Ralph Heinzen Self monitoring static seal with optical sensor
EP2662565A1 (fr) 2012-05-10 2013-11-13 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Dispositif de compression pour installation de travail par jets de fluide cryogénique
US20150226220A1 (en) * 2014-02-13 2015-08-13 Pentair Flow Technologies, Llc Pump and Electric Insulating Oil for Use Therein
WO2020028531A1 (en) * 2018-07-31 2020-02-06 Bio-Chem Fluidics, Inc. Piston pump comprising an electro-fluidic leak detection element
US11255319B2 (en) * 2019-03-09 2022-02-22 Neo Mechanics Limited Shaft-cylinder assembly for high temperature operation
WO2023092806A1 (zh) * 2021-11-29 2023-06-01 烟台杰瑞石油服务集团股份有限公司 盘根泄露检测系统及方法
US11686301B2 (en) 2019-04-02 2023-06-27 Northern Tool & Equipment Company, Inc. Pump system with leak damage protection

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2364557A1 (fr) 1976-09-14 1978-04-07 Seb Sa Dispositif de securite destine a interrompre le fonctionnement d'un appareil actionne par un moteur electrique
US4182518A (en) 1978-02-03 1980-01-08 Pilgrim Engineering Developments Limited Sealing arrangements
DE19503864A1 (de) * 1995-02-07 1996-08-08 Kamat Pumpen Gmbh & Co Kg Überwachung des Verschleißes von Pumpendichtungen
CN112324646A (zh) * 2019-08-05 2021-02-05 中国石油天然气股份有限公司 柱塞泵装置

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Publication number Priority date Publication date Assignee Title
US2801409A (en) * 1956-05-15 1957-07-30 Sperling Gustav Electrically operated leak detector
US3180134A (en) * 1962-06-04 1965-04-27 Pan American Petroleum Corp Leak detector for oil well pump
US3209830A (en) * 1963-03-29 1965-10-05 Continental Oil Co Stuffing box assembly
US3276246A (en) * 1964-03-11 1966-10-04 Sinclair Research Inc Stuffing box with leakage detector

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2801409A (en) * 1956-05-15 1957-07-30 Sperling Gustav Electrically operated leak detector
US3180134A (en) * 1962-06-04 1965-04-27 Pan American Petroleum Corp Leak detector for oil well pump
US3209830A (en) * 1963-03-29 1965-10-05 Continental Oil Co Stuffing box assembly
US3276246A (en) * 1964-03-11 1966-10-04 Sinclair Research Inc Stuffing box with leakage detector

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4135859A (en) * 1975-07-30 1979-01-23 J. M. Huber Corporation Pollution control device adapted for attachment to reservoir gland stuffing boxes
US4178133A (en) * 1977-04-14 1979-12-11 Binks Manufacturing Company Double-acting flexible tube pump
US4576553A (en) * 1980-12-22 1986-03-18 Black & Decker Inc. Painting applicator with remote supply
US4444545A (en) * 1982-04-08 1984-04-24 Sanders David F Pump control system
US4535326A (en) * 1982-07-21 1985-08-13 Joy Manufacturing Company Liner deterioration warning for fluid movers
US4878815A (en) * 1988-05-18 1989-11-07 Stachowiak J Edward High pressure reciprocating pump apparatus
US4916938A (en) * 1988-08-25 1990-04-17 Atomic Energy Of Canada Limited Valve leakage inspection, testing and maintenance process
DE3931544A1 (de) * 1988-09-21 1990-03-22 Hitachi Ltd Tauchkolbenpumpe
US5129790A (en) * 1988-09-21 1992-07-14 Hitachi, Ltd. Plunger pump
US5088385A (en) * 1991-02-19 1992-02-18 Westinghouse Electric Corp. Actuator apparatus with secondary seal motion
US5217235A (en) * 1991-04-25 1993-06-08 James Howden & Co. Ltd. Seal assembly
US5174722A (en) * 1991-08-09 1992-12-29 Bomar Corporation Safety shutdown circuit for pneumatic pump system
US5246235A (en) * 1992-02-25 1993-09-21 Ralph Heinzen Seal with embedded wire
US5628516A (en) * 1994-08-29 1997-05-13 Grenke; Edward Sealing assembly for rotary oil pumps having means for leaks detection and method of using same
US6082737A (en) * 1997-08-20 2000-07-04 John Crane Inc. Rotary shaft monitoring seal system
US20040075218A1 (en) * 1998-06-03 2004-04-22 Ralph Heinzen Self monitoring static seal with optical sensor
US7405818B2 (en) 1998-06-03 2008-07-29 Ralph Heinzen Self monitoring static seal with optical sensor
EP2662565A1 (fr) 2012-05-10 2013-11-13 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Dispositif de compression pour installation de travail par jets de fluide cryogénique
FR2990478A1 (fr) * 2012-05-10 2013-11-15 Air Liquide Dispositif de compression pour installation de travail par jets de fluide cryogenique
US20150226220A1 (en) * 2014-02-13 2015-08-13 Pentair Flow Technologies, Llc Pump and Electric Insulating Oil for Use Therein
WO2020028531A1 (en) * 2018-07-31 2020-02-06 Bio-Chem Fluidics, Inc. Piston pump comprising an electro-fluidic leak detection element
US20200040890A1 (en) * 2018-07-31 2020-02-06 Bio-Chem Fluidics, Inc. Piston pump comprising an electro-fluidic leak detection element
US11499546B2 (en) * 2018-07-31 2022-11-15 Bio-Chem Fluidics, Inc. Piston pump comprising an electro-fluidic leak detection element
US11255319B2 (en) * 2019-03-09 2022-02-22 Neo Mechanics Limited Shaft-cylinder assembly for high temperature operation
US11686301B2 (en) 2019-04-02 2023-06-27 Northern Tool & Equipment Company, Inc. Pump system with leak damage protection
WO2023092806A1 (zh) * 2021-11-29 2023-06-01 烟台杰瑞石油服务集团股份有限公司 盘根泄露检测系统及方法

Also Published As

Publication number Publication date
GB1433689A (en) 1976-04-28
AU6843274A (en) 1975-11-06
USB367021I5 (en, 2012) 1975-01-28
CA1036239A (en) 1978-08-08

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