JP5287085B2 - Unloader mechanism, unloader yoke, and reciprocating compressor - Google Patents

Unloader mechanism, unloader yoke, and reciprocating compressor Download PDF

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JP5287085B2
JP5287085B2 JP2008244863A JP2008244863A JP5287085B2 JP 5287085 B2 JP5287085 B2 JP 5287085B2 JP 2008244863 A JP2008244863 A JP 2008244863A JP 2008244863 A JP2008244863 A JP 2008244863A JP 5287085 B2 JP5287085 B2 JP 5287085B2
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valve plate
valve
diameter
unloader
reciprocating compressor
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JP2010077841A (en
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稔 川根
長規 金島
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株式会社Ihi
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  The present invention relates to an unloader mechanism that switches an operation state of a reciprocating compressor from a loaded operation state to a no-load operation state, an unloader yoke that holds an intake valve in the reciprocating compressor in an open state, and the like.

  Normally, a reciprocating compressor that generates compressed air is equipped with an unloader mechanism that switches the operation state from a load operation state to a no-load operation state, and the configuration of a general unloader mechanism is as follows. .

  That is, the valve presser in the reciprocating compressor is provided with an operating rod, and this operating rod is arranged in the approaching direction or the separating direction in which the suction valve is approached to the suction valve in the reciprocating compressor (in other words, the suction valve is operated). It is possible to move in the opening and closing directions. Further, a diaphragm is provided on the top surface of the valve presser so as to cover a base end surface of the operating rod, and this diaphragm is configured to press the operating rod in the approaching direction when receiving an operation pressure. Yes. Further, a spring for urging the operating rod in the separating direction is provided inside the valve presser.

  An unloader yoke that holds the suction valve in an open state (opened state) is provided at the distal end portion of the operating rod. The unloader yoke has a plurality of first pressing claws that press to open the large-diameter outer ring valve plate in the suction valve, and a plurality of second pressing claws that press to open the intermediate-diameter intermediate valve plate in the suction valve. (See the unloader yoke according to a comparative example described later).

  Accordingly, during operation of the reciprocating compressor, operating pressure is appropriately supplied to the diaphragm, and the operating rod is pressed in the approaching direction by the diaphragm, so that the operating rod is moved in the approaching direction against the biasing force of the spring. The outer ring valve plate and the intermediate valve plate are each opened by the plurality of first pressing claws and the plurality of second pressing claws. As a result, the operation state of the reciprocating compressor can be switched from the load operation state to the no-load operation state while the suction valve is held open by the unloader yoke.

  After the operation state of the reciprocating compressor is switched to the no-load operation state, by stopping the supply of the operation pressure to the diaphragm, the operating rod is moved in the separation direction by the biasing force of the spring, and the plurality of first pressing claws And the pressing state by the plurality of second pressing claws are respectively released. Thereby, the operation state of the reciprocating compressor can be returned to the load operation state.

In addition, there exists a thing shown to patent document 1 and patent document 2 as a prior art relevant to this invention.
JP 2002-115663 A JP-A-11-117870

  By the way, in the above-described general unloader mechanism, the unloader yoke presses the large-diameter outer ring valve plate and the medium-diameter intermediate valve plate in the intake valve so that the small-diameter inner ring valve plate in the intake valve is opened. The operation state of the reciprocating compressor was switched to the no-load operation state without pressing it to open, and the intake valve could not be kept fully open. Therefore, the air flow resistance of the intake valve in the no-load operation state increases, and it is difficult to sufficiently reduce the power consumption (power consumption) of the reciprocating compressor.

  Therefore, an object of the present invention is to provide an unloader mechanism, an unloader yoke, and a reciprocating compressor having a novel configuration that can solve the above-described problems.

A first feature of the present invention resides in an unloader mechanism that holds an intake valve in a reciprocating compressor in an open state (opened state) and switches the operating state of the reciprocating compressor from a load operating state to a no-load operating state. An actuating rod provided on a valve presser in the reciprocating compressor and movable in an approaching direction and a separating direction approaching the suction valve (in other words, an opening direction and a closing direction for opening the suction valve) And a diaphragm configured to cover the base end surface of the operating rod on the top surface of the valve presser and configured to press the operating rod in the approaching direction upon receiving an operation pressure, and the operating rod An urging member for urging in the separating direction, and provided at a tip portion of the operating rod, on an outer ring valve plate of a large diameter (a large inner diameter and a large outer diameter) in the suction valve at equal intervals along the circumferential direction Arranged and A plurality of first pressing claws that press the outer ring valve plate to open, and are arranged at equal intervals along the circumferential direction on an intermediate valve plate of medium diameter (medium inner diameter and medium outer diameter) in the suction valve and the intermediate A plurality of second pressing claws that press to open the valve plate, and the inner ring valve arranged at equal intervals along the circumferential direction on a small diameter (small inner diameter and small outer diameter) inner ring valve plate of the suction valve; An unloader yoke having a plurality of third pressing claws that press the plate so as to open the plate and holding the suction valve in an open state, the unloader yoke being a single plate .

  In the claims and specification of the present application, “provided” means not only directly provided but also indirectly provided via an interposition member.

  According to the first feature, during operation of the reciprocating compressor, an operating pressure is appropriately supplied to the diaphragm, and the operating rod is pressed in the approaching direction by the diaphragm, whereby the operating rod is attached to the diaphragm. The outer ring valve plate and the intermediate member are moved in the approaching direction against the urging force of the urging member, and the plurality of first pressing claws, the plurality of second pressing claws, and the plurality of third pressing claws The valve plate and the inner ring valve plate are pressed to open. Accordingly, the suction valve is held open by the unloader yoke, and the operation state of the reciprocating compressor can be switched from the load operation state to the no-load operation state.

  Here, since the unloader yoke is pressed to open not only the large-diameter outer ring valve plate and medium-diameter intermediate valve plate but also the small-diameter inner ring valve plate, the intake valve is sufficiently released. Can be kept in a state. A plurality of the first pressing claws, a plurality of the second pressing claws, and a plurality of the third pressing claws are circumferentially arranged on the outer ring valve plate, the intermediate valve plate, and the inner ring valve plate, respectively. Are arranged at equal intervals along the outer ring valve plate, the intermediate valve plate, and the plurality of first press claws, the plurality of second press claws, and the plurality of third press claws, respectively. The inner ring valve plate can be evenly pressed along the circumferential direction, and the intake valve can be held in a stable open state.

  After switching the operating state of the reciprocating compressor to a no-load operating state, by stopping the supply of operating pressure to the diaphragm, the operating rod is moved in the separation direction by the biasing force of the biasing member, The pressing state by the plurality of first pressing claws, the pressing state by the plurality of second pressing claws, and the pressing state by the plurality of third pressing claws are respectively released. Thereby, the operation state of the reciprocating compressor can be returned to the load operation state.

A second feature of the present invention is used in an unloader mechanism that switches the operating state of a reciprocating compressor from a load operating state to a no-load operating state, and holds the intake valve in the reciprocating compressor in an open state (open state). In the unloader yoke, a plurality of first presses that are arranged at equal intervals along the circumferential direction on a virtual ring having the same diameter as the large-diameter outer ring valve plate in the intake valve and press the open ring valve plate so as to open the outer ring valve plate And a plurality of second pressing claws arranged at equal intervals along the circumferential direction on a virtual ring having the same diameter as the intermediate valve plate having the same diameter as the intermediate valve plate in the suction valve and pressing the intermediate valve plate to open. A plurality of third pressing claws disposed at equal intervals along the circumferential direction on a virtual ring having the same diameter as the small-diameter inner ring valve plate in the intake valve and pressing the inner ring valve plate so as to open the inner ring valve plate. , and abstracts that it consists a single plate That.

  In addition, according to the 2nd characteristic, there exists an effect | action similar to the effect | action by a 1st characteristic.

  The gist of the third feature is that a reciprocating compressor that generates compressed gas (including compressed air) is provided with an unloader mechanism comprising the first feature.

  In addition, according to the 3rd characteristic, there exists an effect | action similar to the effect | action by a 1st characteristic.

  According to the present invention, since the suction valve can be held in a sufficiently and stably released state, the gas flow resistance of the suction valve in a no-load operation state is reduced, and the consumption of the reciprocating compressor is reduced. Power (power consumption) can be sufficiently reduced.

  An embodiment of the present invention will be described with reference to FIGS. Here, FIG. 1 is a sectional view showing an unloader mechanism according to an embodiment of the present invention, FIG. 2 is a sectional view showing a relationship between an unloader yoke and an intake valve according to the embodiment of the present invention, and FIG. FIG. 4 is a perspective view showing the relationship between the unloader yoke and the valve presser according to the embodiment of the present invention, and FIG. 5 shows the embodiment of the present invention. It is a schematic diagram of the reciprocating compressor which concerns.

  As shown in FIG. 5, the reciprocating compressor 1 according to the embodiment of the present invention compresses air (an example of gas) in two stages to generate compressed air (an example of compressed gas). The configuration of the reciprocating compressor 1 is roughly described as follows.

  That is, a support shaft (not shown) in the reciprocating compressor 1 is provided with a crankshaft 3 extending in the horizontal direction so as to be rotatable. The crankshaft 3 has two eccentric portions that are eccentric with respect to the shaft center. 5 Further, the support frame is provided with a motor 7 for rotating the crankshaft 3, and an output shaft 9 of the motor 7 is connected to a base end portion of the crankshaft 3 by a coupling or the like.

  The support frame is provided with two reciprocating cylinders (first-stage cylinder 11 and second-stage cylinder 13) radially about the axis of the crankshaft 3. The second stage cylinder 13 compresses the air (compressed air) compressed by the first stage cylinder 11 to a higher pressure. Each cylinder 11 (13) includes a cylinder block 15 fixed to the support frame, a piston 17 provided in the cylinder block 15 so as to be able to reciprocate, a base end portion connected to the piston 17 and a distal end portion. And a piston rod 21 rotatably connected to the corresponding eccentric portion 5 via a connecting rod 19, and a plurality of suction ports 23 (see FIG. 1) on the upper end side and the lower end side of the cylinder block 15 and a valve presser 25 (see FIG. 1). 1) and a discharge valve 29 provided to each of a plurality of discharge ports (not shown) on the upper end side and lower end side of the cylinder block 15 via valve pressers (not shown). And.

  Filters 31 for filtering air are connected to the side of the plurality of intake valves 27 in the first stage cylinder 11. The plurality of discharge valves 29 in the first stage cylinder 11 and the plurality of intake valves in the second stage cylinder 13 are connected. An intercooler 33 that cools the air compressed by the first stage cylinder 11 is provided between the 27th side. A discharge pipe 35 for discharging compressed air is provided on the side of the plurality of discharge valves 29 in the second cylinder 13, and the discharge pipe 35 can be connected to an air reservoir (not shown).

  The specific configuration of the suction valve 27 in each cylinder 11 (13) is as follows.

That is, as shown in FIGS. 1 to 3, the suction port 23 of the cylinder block 15 is provided with a circular valve seat 37, and the valve seat 37 has a virtual circle having a large diameter (large outer diameter). A plurality of (eight in the embodiment of the present invention) first elongated holes 39 arranged along the circumferential direction, and along the circumferential direction of a virtual circle having a medium diameter (medium outer diameter) Are spaced along the circumferential direction of a plurality of (four in the embodiment of the present invention) second long holes 41 and a small circle (small outside diameter) virtual circle. A plurality of (three in the embodiment of the present invention) side-by-side third elongated holes 43 are formed concentrically. The valve seat 37 is provided with a circular valve guide 45 via bolts. The valve guide 45 includes a first ring groove 47 having a large diameter (a large inner diameter and a large outer diameter), a medium diameter ( A second ring groove 49 having a medium inner diameter and a medium outer diameter) and a third ring groove 51 having a small diameter (small inner diameter and small outer diameter) are formed concentrically.

  Between the first ring groove 47 of the valve guide 45 and the valve seat 37, an outer ring valve plate 53 having a large diameter (a large inner diameter and a large outer diameter) capable of opening and closing the openings of the plurality of first elongated holes 39 has a large diameter. The outer ring spring plate 55 and the outer ring backing plate 57 (large inner diameter and large outer diameter) are provided. Further, between the second ring groove 49 of the valve guide 45 and the valve seat 37, there is an intermediate valve plate 59 of medium diameter (medium inner diameter and medium outer diameter) capable of opening and closing the openings of the plurality of second long holes 41. The intermediate spring plate 61 and the intermediate backing plate 63 having a diameter (medium inner diameter and medium outer diameter) are provided. Further, between the third ring groove 51 of the valve guide 45 and the valve seat 37, an inner ring valve plate 65 having a small diameter (small inner diameter and small outer diameter) capable of opening and closing the openings of the plurality of third long holes 43 is formed with a small diameter. The inner ring spring plate 67 and the inner ring backing plate 69 (small inner diameter and small outer diameter) are provided. The outer ring valve plate 53, the intermediate valve plate 59, and the inner ring valve plate 65 are each made of synthetic resin.

  The reciprocating compressor 1 according to the embodiment of the present invention is equipped with an unloader mechanism 71 that switches an operation state from a load operation state to a no-load operation state, and the configuration of the unloader mechanism 71 is as follows.

  That is, as shown in FIGS. 1 and 4, the valve retainer 25 is provided with an operating rod 73, and this operating rod 73 is composed of a sleeve and a bolt that penetrates and is fixed to the sleeve. Thus, it can move in an approaching direction and a separating direction approaching the suction valve 27 (in other words, an opening direction and a closing direction in which the suction valve 27 is opened). A diaphragm 75 is provided on the top surface of the valve presser 25 via a diaphragm cap 77 so as to cover the base end surface of the operating rod 73. When the diaphragm 75 receives operating pressure from the surface side, the operating rod is operated. It is comprised so that 73 may be pressed to the said approach direction. Further, a spring 79 is provided inside the valve presser 25, and this spring 79 urges the operating rod 73 in the separating direction so that the base end surface of the operating rod 73 is in pressure contact with the back surface of the diaphragm 75. Is.

  An unloader yoke 81 that holds the suction valve 27 in an opened state (opened state) is provided at the tip of the operating rod 73. The unloader yoke 81 is made of a single plate and is rotated. The stop pin 83 prevents the valve presser 25 from rotating. The unloader yoke 81 includes a plurality of (eight in the embodiment of the present invention) first pressing claws 85 and an intermediate diameter intermediate valve plate 59 that press the large-diameter outer ring valve plate 53 to open. A plurality of (four in the embodiment of the present invention) second pressing claws 87 and a plurality of small diameter inner ring valve plates 65 to be pressed to open (in the embodiment of the present invention) Has two third pressing claws 89.

  Here, the plurality of first pressing claws 85 are equally spaced along the circumferential direction on the large-diameter outer ring valve plate 53 (in other words, on the virtual ring having the same diameter as the large-diameter outer ring valve plate 53). It arrange | positions and each 1st press nail | claw 85 can be penetrated to the corresponding 1st long hole 39. FIG. Further, the plurality of second pressing claws 87 are arranged at equal intervals along the circumferential direction on the intermediate valve plate 59 having a medium diameter (in other words, on a virtual ring having the same diameter as the intermediate valve plate 59 having a medium diameter). Thus, each second pressing claw 87 can be inserted into the corresponding second long hole 41. Further, the plurality of third pressing claws 89 are arranged at equal intervals along the circumferential direction on the small-diameter inner ring valve plate 65 (in other words, on a virtual ring having the same diameter as the small-diameter inner ring valve plate 65). Thus, each third pressing claw 89 can be inserted into the corresponding third elongated hole 43.

  Then, the effect | action and effect of embodiment of this invention are demonstrated.

  By rotating the crankshaft 3 by driving the motor 7, the piston 17 in the first stage cylinder 11 and the piston 17 in the second stage cylinder 13 can be reciprocated, respectively. Thereby, the air can be compressed into high pressure in two stages by the first stage cylinder 11 and the second stage cylinder 13 to generate compressed air.

  During operation of the reciprocating compressor 1, operating pressure is appropriately supplied to the diaphragm 75, and the operating rod 73 is pressed in the approaching direction by the diaphragm 75, so that the operating rod 73 resists the biasing force of the spring 79. The outer ring valve plate 53, the intermediate valve plate 59, and the inner ring valve plate 65 are moved in the approaching direction by the plurality of first pressing claws 85, the plurality of second pressing claws 87, and the plurality of third pressing claws 89. Press to open each one. Thereby, the suction valve 27 is held in the open state by the unloader yoke 81, and the operation state of the reciprocating compressor 1 can be switched from the load operation state to the no-load operation state.

  Here, the unloader yoke 81 presses not only the large-diameter outer ring valve plate 53 and the medium-diameter intermediate valve plate 59 but also the small-diameter inner ring valve plate 65 so that the intake valve 27 is fully released. Can be kept in a state. Further, the plurality of first pressing claws 85, the plurality of second pressing claws 87, and the plurality of third pressing claws 89 are circumferentially arranged on the outer ring valve plate 53, the intermediate valve plate 59, and the inner ring valve plate 65, respectively. Since the plurality of first pressing claws 85, the plurality of second pressing claws 87, and the plurality of third pressing claws 89 are arranged at equal intervals along the outer ring valve plate 53, the intermediate valve plate 59, and the inner ring, respectively. The valve plate 65 can be evenly pressed along the circumferential direction, and the suction valve 27 can be stably held open.

  After switching the operation state of the reciprocating compressor 1 to the no-load operation state, the operation rod 73 is moved in the separation direction by the urging force of the spring 79 by stopping the supply of the operation pressure to the diaphragm 75, thereby The pressing state by the first pressing claw 85, the pressing state by the plurality of second pressing claws 87, and the pressing state by the plurality of third pressing claws 89 are respectively released. Thereby, the operation state of the reciprocating compressor 1 can be returned to the load operation state.

  Therefore, according to the embodiment of the present invention, since the suction valve 27 can be held in a sufficiently and stably released state, the air flow resistance of the suction valve 27 in the no-load operation state is reduced, and the reciprocating The power consumption (power consumption) of the compressor 1 can be sufficiently reduced.

  In addition, this invention is not restricted to description of the above-mentioned embodiment, In addition, it can implement in a various aspect. Further, the scope of rights encompassed by the present invention is not limited to these embodiments.

(Comparative example)
Before describing the specific contents of the embodiment, the unloader yoke according to the comparative example will be briefly described with reference to FIGS. 6 and 7. FIG. 6 is a plan view showing the relationship between the unloader yoke and the suction valve according to the comparative example, and FIG. 7 is a perspective view showing the relationship between the unloader yoke and the valve presser according to the comparative example.

  As shown in FIGS. 6 and 7, the unloader yoke 91 according to the comparative example is a conventional type unloader yoke, and a plurality of the unloader yokes 91 that press the large-diameter outer ring valve plate 53 to open (in the comparative example, There are four (four) first pressing claws 93 and a plurality of (two in the comparative example) second pressing claws 95 that press the middle diameter intermediate valve plate 59 so as to open.

(Specific contents of the example)
When the unloader yoke 91 according to the comparative example is used instead of the unloader mechanism, the power (electric power) of the reciprocating compressor in the no-load operation state is 15 kW, whereas the unloader mechanism is an embodiment of the present invention. When such an unloader yoke 81 was used, it was confirmed that the power of the reciprocating compressor in the no-load operation state was 10.5 kW. That is, by using the unloader yoke 81 according to the embodiment of the present invention for the unloader mechanism, the power of the reciprocating compressor in the no-load operation state can be reduced by 30%.

It is sectional drawing which shows the unloader mechanism which concerns on embodiment of this invention. It is sectional drawing which shows the relationship between the unloader yoke and suction valve which concern on embodiment of this invention. It is a top view which shows the relationship between the unloader yoke and suction valve which concern on embodiment of this invention. It is a perspective view which shows the relationship between the unloader yoke which concerns on embodiment of this invention, and a valve holder. It is a mimetic diagram of a reciprocating compressor concerning an embodiment of the present invention. It is a top view which shows the relationship between the unloader yoke and suction valve which concern on a comparative example. It is a perspective view which shows the relationship between the unloader yoke and valve presser concerning a comparative example.

Explanation of symbols

1 Reciprocating Compressor 11 First Stage Cylinder 13 Second Stage Cylinder 15 Cylinder Block 17 Piston 19 Connecting Rod 21 Piston Rod 25 Valve Presser 27 Suction Valve 29 Discharge Valve 53 Outer Ring Valve Plate 59 Intermediate Valve Plate 65 Inner Ring Valve Plate 71 Unloader Mechanism 73 Actuation rod 75 Diaphragm 77 Diaphragm cap 79 Spring 81 Unloader yoke 83 Stop pin 85 First pressing claw 87 Second pressing claw 89 Third pressing claw

Claims (3)

  1. In the unloader mechanism that holds the suction valve in the reciprocating compressor in an open state and switches the operating state of the reciprocating compressor from the load operating state to the no-load operating state,
    An operating rod provided in a valve presser in the reciprocating compressor, and movable in an approaching direction and a separating direction approaching the suction valve;
    A diaphragm provided on the top surface of the valve presser so as to cover the base end surface of the operating rod, and configured to press the operating rod in the approaching direction upon receiving an operation pressure;
    A biasing member that biases the operating rod in the separating direction;
    A plurality of first pressing claws provided at a distal end portion of the operating rod and arranged at equal intervals along the circumferential direction on a large-diameter outer ring valve plate in the suction valve and pressing the outer ring valve plate so as to open the outer ring valve plate A plurality of second pressing claws arranged at equal intervals along the circumferential direction on the intermediate-diameter intermediate valve plate in the intake valve and pressing the intermediate valve plate so as to open, and a small-diameter inner ring in the intake valve An unloader yoke arranged on the valve plate at equal intervals along the circumferential direction and having a plurality of third pressing claws for pressing the inner ring valve plate to open, and holding the suction valve in an open state; equipped with a,
    The unloader mechanism is characterized in that the unloader yoke is a single plate .
  2. In the unloader mechanism that is used in the unloader mechanism that switches the operation state of the reciprocating compressor from the load operation state to the no-load operation state, and holds the suction valve in the reciprocating compressor in an open state,
    A plurality of first pressing claws arranged at equal intervals along a circumferential direction on a virtual ring having the same diameter as a large-diameter outer ring valve plate in the suction valve, and pressing the outer ring valve plate to open;
    A plurality of second pressing claws that are arranged at equal intervals along the circumferential direction on a virtual ring having the same diameter as the intermediate valve plate having the same diameter as the intermediate valve plate in the suction valve, and that presses the intermediate valve plate to open;
    A plurality of third pressing claws that are arranged at equal intervals along the circumferential direction on a virtual ring having the same diameter as the small-diameter inner ring valve plate in the intake valve, and that presses to open the inner ring valve plate ;
    An unloader yoke comprising a single plate .
  3. In a reciprocating compressor that generates compressed gas,
    A reciprocating compressor comprising the unloader mechanism according to claim 1 .
JP2008244863A 2008-09-24 2008-09-24 Unloader mechanism, unloader yoke, and reciprocating compressor Active JP5287085B2 (en)

Priority Applications (1)

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JP2008244863A JP5287085B2 (en) 2008-09-24 2008-09-24 Unloader mechanism, unloader yoke, and reciprocating compressor

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Application Number Priority Date Filing Date Title
JP2008244863A JP5287085B2 (en) 2008-09-24 2008-09-24 Unloader mechanism, unloader yoke, and reciprocating compressor

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JP5287085B2 true JP5287085B2 (en) 2013-09-11

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Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1793000A (en) * 1928-05-18 1931-02-17 Ingersoll Rand Co Inlet unloader valve
EP0345245B1 (en) * 1988-05-31 1993-10-13 Hoerbiger Ventilwerke Aktiengesellschaft Ring valve
JP4437864B2 (en) * 2000-09-06 2010-03-24 東邦瓦斯株式会社 Reciprocating compressor suction / discharge valve
JP4529057B2 (en) * 2000-10-04 2010-08-25 株式会社Ihi High pressure compression equipment and its no-load operation method

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