JPH10132180A - Pipe joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent gas or liquid from flowing out by automatically separating a pipe joint when tension having the prescribed value or more is applied to the pipe joint and by automatically closing a valve in the pipe joint. SOLUTION: In this pipe joint, a socket and a plug can be connected to each other by the engagement of a locking member 2 provided on a socket main body 1 with a recessed part formed on a plug main body, and the locking member 2 can be engaged with or disengaged from a locking recessed part of the plug by the operation of a sleeve fitted on the outer periphery of the socket main body 1 so as to be freely slid. A sleeve spring 3 for restraining the movement in the outside diameter direction of the locking member through a process of sliding the sleeve is provided between the socket main body 1 and the sleeve 4, a spring holder 24 is fitted to the outer periphery of the socket main body, an adapter 21 to be brought in contact with and separated from the socket main body 1 is provided on the spring holder 24, and a coil spring 8 for marking the socket main body 1 side and the adapter 21 into the contact state is arranged between the spring holder 24 and the socket main body 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint for flowing gas such as LP gas or various liquids, and more particularly, to a case where an LP gas container falls down during an earthquake or the like, or In the event of a fire, when the pipe joint is connected and a tensile force exceeding a predetermined value is applied while the pipe joint is connected, the pipe joint is automatically disengaged and the valve inside the pipe joint is automatically closed and the gas is released. Or a pipe fitting that can prevent liquid from flowing out, and if the pipe downstream of the pipe fitting is damaged when the pipe joint is connected,
Automatically closes the valve in the fitting using the pressure of the pressure supply source or the residual pressure in the conduit, ensuring safety that can prevent the situation where fluid continues to flow out from the damaged part. It relates to an excellent pipe joint.

[0002]

2. Description of the Related Art Conventionally, when a tensile force of a predetermined value or more is applied to a pipe joint, the pipe joint is automatically released, and a valve in the pipe joint is automatically closed. For example, a pipe joint as disclosed in Japanese Patent Publication No. 47-19829 is well known.

[0003] The schematic structure of a pipe joint disclosed in the above publication will be described with reference to FIG.
02 is a plug, 103 is a sheath tube slidably provided on the plug 102, and valves 104 and 105 are disposed in the socket 101 and the plug 102, respectively. The valves 104 and 105 individually provided resiliently press each other to open the flow paths 106 and 106 ′, thereby establishing a communication state between the flow paths. In such a state, the socket 10
1 and the plug 102 act as an external force, for example, when the plug 102 is pulled, the sheath tube 103 is simultaneously pulled against the urging force of the coil spring 107, and the plug 102 and the sheath tube 10 are pulled.
3 moves in a direction to come out of the socket 101.

When the pulling force exceeds a predetermined value and the sheath tube 103 moves rightward in the figure while bending the coil spring 107, the projection 103a of the sheath tube 103 does not face the ball 108 at last. The large-diameter inner surface 103b is opposed to the ball 108 and the restraint on the ball 108 is released.
The plug 102 and the socket 101 are disconnected from each other. As soon as the connection between the plug 102 and the socket 101 is released, the valves 104 and 105 are closed by the respective spring forces 104a and 105a. Therefore, even if a tensile force of a predetermined value or more acts on the conduit due to an earthquake or the like, the pipe joint is automatically released by the force at that time, and the valve in the pipe joint is automatically closed. It is possible to prevent the fluid in the conduit from flowing out of the pipe fitting.

[0005]

However, in the above-mentioned pipe joint, since the automatic releasing force depends on the strength of the coil spring 107, the urging force of the coil spring 107 is reduced in order to increase the automatic releasing force. When strengthened,
At the time of the normal operation of moving the sheath tube 103 against the urging force of the coil spring 107 and inserting the plug 102 into the socket 101, the operating force of the sheath tube 103 becomes excessively large and hinders the connection operation. come. Also, in this type of fitting, if the pipe of the fitting is damaged when the socket 101 and the plug 102 are connected, the valves in the socket and the plug are in an open state. The fluid in the conduit and the LP gas container (not shown) continues to flow out from the location, which has a safety problem.

Accordingly, the present invention makes it possible to easily perform the connection operation of the pipe joint, and to connect the pipe joint when an accident such as the LP gas container falls due to an earthquake or the like or when a fire occurs. If a tensile force equal to or more than a predetermined value is applied to the pipe joint in the state where it is in the state, the pipe joint is automatically released, and at the same time, the valve in the pipe joint is automatically closed,
In addition to preventing the outflow of gas and liquid, if the pipe downstream of the pipe is damaged while the pipe is connected, use the residual pressure in the pipe or the pressure of the pressure source to make the pipe An object of the present invention is to provide a pipe joint with excellent safety that can automatically close a valve inside the pipe.

According to the present invention, the coil spring for the sleeve and the coil spring for the automatic release are combined with a single coil spring, so that the tension load at the time of the automatic release is reduced. Can be freely determined according to the setting method of. In addition, since the coil spring is separated, the sleeve can be operated with a light force in the same manner as a normal pipe joint, and the connection and disconnection of the socket and the plug become easy. Furthermore, since an over-spill valve is provided in the fitting, even if the hose is damaged on the downstream side of the fitting when the fitting is in the connected state, the over-spill valve in the socket closes, preventing fluid outflow. Can be prevented.

[0008]

The technical solution adopted by the present invention to achieve the above object is to form a socket and a plug by engaging a locking member provided on the socket body with an engaging recess formed on the plug body. A pipe joint which can be connected and which can engage and disengage the engaging member with an engaging concave portion of the plug by operating a sleeve which is slidably fitted in an axial direction on an outer peripheral portion of the socket main body; A sleeve spring is provided between the sleeve and the sleeve to stop the movement of the locking member in the radial direction by sliding the sleeve, and a spring holder is slidably axially slidable on the outer periphery of the socket body. In addition, the spring holder is provided with an adapter that can come and go with the socket body,
A coil spring is provided between the spring holder and the socket main body so that the socket main body side and the adapter are always in contact with each other. Further, one end of the spring holder is provided so as to be engageable with the sleeve. The socket body and the adapter are separated from each other against the urging force of the coil spring when a tensile force greater than or equal to a predetermined value acts on the plug and the plug. Characterized in that the sleeve is moved in the pulling direction against the urging force of the sleeve spring to release the restraining of the locking member in the outer diameter direction. And

The socket and the plug can be connected by the engagement between the engaging member provided on the socket body and the engaging recess formed on the plug body, and the above-mentioned engaging member is operated by operating the sleeve fitted on the outer peripheral portion of the socket body. A valve abutting member is provided inside the socket body of the pipe joint capable of engaging and disengaging from the concave portion, and a backflow prevention valve biased by a spring is abutted on one side of the valve abutting member. When the overflow prevention valve urged by a spring abuts on the side, the backflow prevention valve moves against the urging force of the spring due to fluid pressure acting on the valve, and a sealing surface formed on the inner periphery of the socket body. Is configured to close the flow path by contacting
Also, the overflow prevention valve is configured to close the flow path by abutting against a sealing surface formed on the inner periphery of the socket body when the overflow prevention valve moves against the urging force of the spring by the fluid pressure acting on the valve. It is a pipe joint.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of a pipe joint according to the present invention will be described below with reference to the drawings. FIG. 1 is a half sectional view of a socket S of the pipe joint according to the present embodiment, and FIG. A
FIG. 3 is a half sectional view of a plug P connected to the socket S.

In FIG. 1, reference numeral 1 denotes a socket body;
The socket body 1 includes a front cylinder 1A and a rear cylinder 1B,
A sleeve 4 is slidably fitted around the outer periphery of the front cylinder 1A, and a sleeve spring 3 for urging the sleeve 4 rightward in the figure is disposed between the front cylinder 1A and the sleeve 4. . The sleeve 4 is a ball 2 serving as a locking member for locking a plug P described later by the action of a stepped portion 4 b formed on the inner periphery of the sleeve 4 by the urging force of the sleeve spring 3.
Is prevented from moving in the radial direction.

A rear cylinder 1B, which houses a valve to be described later, is screwed and fixed to the inner periphery of the left end of the front cylinder 1A in the drawing, and a collar 7 is fixed to the inner periphery of the front cylinder 1A. A coil spring 8 is provided slidably and biases the collar 7 rightward in the figure between the end of the rear cylinder 1B and the collar 7. The collar 7 is prevented from falling off from the front cylinder 1A by the projection 7a provided on the outer periphery of the collar 7 abutting against the projection 1a formed on the inner peripheral surface of the front cylinder 1A. When the ball P is not connected, the ball 2 functions to stop the movement of the ball 2 in the centripetal direction, and the sleeve 2 moves forward on the inclined surface 4a formed on the sleeve 4 by the ball 2 moved in the outer diameter direction. It is stopped. In the figure, reference numeral 5 denotes a collar which functions both as the removal of the sleeve 4 and dust prevention, and reference numeral 6 denotes a stop ring for fixing the collar 5.

A spring holder 24 is slidably fitted on the left outer periphery of the rear cylinder 1B fixed to the front cylinder 1A in the figure, and biases the spring holder 24 between them to the right in the figure. And a coil spring 2 for constantly bringing the rear cylinder 1B into contact with a flange portion 21a of an adapter 21 described later.
The right end in the figure of the spring holder 24 is fitted on the inner peripheral surface of the sleeve 4, and a stop ring 26 provided on the inner peripheral surface of the sleeve 4 separates the spring holder 24 from the sleeve 4. The escape is prevented. The coil spring 23 is a coil spring for determining the automatic release force of the pipe joint. When the force of this coil spring is increased, the tensile force for automatic release is increased, and when it is reduced, the tensile force is reduced. Yes (this effect will be explained in detail later).

An adapter 21 having a flange portion 21a sandwiched between a C-shaped retaining ring 25 and the end surface of the rear cylinder 1B is provided on the inner periphery of the left end portion of the spring holder 24. The adapter 21 is a valve guide to be described later. 19 is slidably fitted in the housing 19, and leakage of fluid from a gap between the valve guide 19 and the adapter 21 is prevented by an O-ring 22 arranged on the outer peripheral surface of the adapter 21. A screw 40 is formed on the left end of the adapter 21 in the drawing to connect to a nipple or the like (not shown) provided at the end of the hose.

The valve guide 1 is provided inside the rear cylinder 1B.
9 is fitted, and a spacer (valve contact member) 15 capable of permitting the passage of fluid is provided between the right end in the figure of the valve guide 19 and the step 9c formed on the rear cylinder 1B. The valve guide 19 has a stop ring 20
Thus, the O-ring 11 is secured on the outer periphery of the valve guide 19 to secure a seal with the inner surface of the rear cylinder 1B.

Rear cylinder 1 on the right side of FIG.
A check valve 12 is slidably provided inside B as shown in FIG. 2 in an enlarged manner. A valve spring 14 is disposed between the two and a biasing force of the valve spring 14 is provided. Thus, the check valve 12 is in contact with the spacer 15. The valve spring 14 is formed as a coil spring in which a thin wire is conically wound so that the check valve 12 can move even when the fluid pressure acting on the check valve 12 is relatively small.

The backflow prevention valve 12 is formed in a cylindrical shape, and further has a partition 12a in the center inside thereof.
A plurality of second holes 12b and 12c are formed, and the flow path can be closed by contacting the outer periphery of the backflow prevention valve 12 with a seal surface 9a formed on the inner peripheral surface of the rear cylinder 1B. A ring 13 is provided. In the backflow prevention valve 12, when the state shown in FIG.
Holes, the second holes 12b, 12c are spaced apart sealing surfaces 9a
And the O-ring 13 to communicate the flow path,
When a fluid pressure of a predetermined value or more acts on the partition wall of the backflow prevention valve 12 from the left side in the figure, the backflow prevention valve 12 moves rightward in the figure against the urging force of the valve spring 14,
The O-ring 13 and the sealing surface 9a come into contact with each other so that the flow path can be shut off.

An overflow prevention valve 16 is provided inside the valve guide 19 on the left side of the figure with the spacer 15 interposed therebetween.
A valve spring 18 for urging the overflow prevention valve 16 rightward in the figure is disposed between the two, and the overflow prevention valve 16 is in contact with the spacer 15 by the urging force of the valve spring 18. Overflow prevention valve 1
6 is formed as a bottomed cylindrical shape, a plurality of holes 16a are formed around the periphery thereof to allow the passage of fluid, and a seal surface 19a formed on a valve guide 19 is formed on the outer periphery of the overflow prevention valve 16. An O-ring 17 is provided which can close the flow path by contacting the O-ring. In the overflow prevention valve 16, in the state shown in FIG.
5 can flow to the central flow path R through the hole 16a, but when a fluid pressure of a predetermined value or more acts on the end face of the overflow prevention valve 16, the overflow prevention valve 16 The O-ring 17 moves to the left in the figure against the urging force of the spring 18 so that the O-ring 17 and the seal surface 19a of the valve guide 19 come into contact with each other, thereby shutting off the flow path. When the socket S and the plug P are connected to the right end of the rear cylinder 1B in the drawing, a contact surface 9b capable of opening a flow path by pushing in a valve body on the plug P side described later. Are formed. Further, at the same end of the rear cylinder 1B, the end face of the valve body 28 and the rear cylinder 1B
A groove 9d is formed in the radial direction so that a flow path can be secured even when the contact surface 9b formed in the above-mentioned state is in contact.
Note that this groove can be provided on the valve body 28 side as needed. The inner circumference of the spacer 15 is formed in a petal or star shape so that fluid flows when the two valves 12 and 16 are in contact with each other.

Next, the configuration of the plug P connected to the socket S will be described with reference to FIG. In the figure, reference numeral 27 denotes a plug body, on the outer periphery of which the plug 2 has an engaging recess 27a for locking the ball 2 on the socket S side. A valve claw 30 having a flow path 30a is provided, and a valve body 28 is slidably fitted to the valve claw 30. A valve spring 29 is disposed between the valve body 28 and the valve claw 30. The urging force of the valve spring 29 causes the valve body 28 to abut on a sealing surface 27 b formed on the inner peripheral surface of the plug body 27 to flow through the flow path. It is shut off. Accordingly, when the plug P is connected to the socket S, the plug P is pushed by the end contact surface 9b of the rear cylinder 1B on the socket side and moves rightward in the figure while bending the valve spring 29 to open the flow path. Has become. In addition, 3 in the figure
1 is a stop ring for retaining the valve claw 30;
Reference numeral 2 denotes an O-ring for preventing fluid from leaking from a connection portion between the tank and the plug P when the plug P is attached to a connection port of a container valve (not shown).

Next, the connection operation of the socket S and the plug P configured as described above, the automatic disconnection operation, and the valve closing operation when the hose is broken will be described. [Piping joint connection operation] When the plug main body 27 is inserted into the socket S in FIG. 4, the collar 7 moves to the left in the drawing against the urging force of the coil spring 8 by the plug main body 27. When the plug body 27 is further inserted,
The ball 2 pressed in the outer diameter direction by the inclined surface 4a of the sleeve 4 urged by the sleeve spring 3 fits into the engagement recess 27a formed in the plug body 27, and the sleeve 4 moves to the plug P side. Then, the movement of the sleeve 4 in the outer diameter direction is suppressed by the step portion 4b, and the two are connected. In this state, the rear cylinder 1B of the socket body 1
The valve body 28 in the plug body 27 is pushed by the end contact surface 9b, moves to the state shown in the figure, and the flow path is opened. In addition, the contact surface between the rear cylinder 1B and the valve body 28 has a flow path secured by a radial groove 9d formed on the rear cylinder 1B side. Also, the backflow prevention valve 12 and the overflow prevention valve 16 in the front cylinder 1A are in normal contact with the spacer 15 to open the flow path as shown in the drawing. For this reason, when the socket S and the plug P are connected, their flow paths are communicated with each other.

[Manual Separation Operation of Pipe Joint] In order to manually separate the connected socket S and plug P, the sleeve 4 is moved toward the adapter 21 against the urging force of the sleeve spring 3. When the plug P is pulled out, the ball 2 is no longer restrained in the outer diameter direction.
The ball 2 comes off from the engagement recess 27a on the plug side, and both can be separated. At this time, the collar 7 in the socket body 1 is moved rightward in the figure by the urging force of the coil spring 8 so that the ball 2 protrudes in the outer diameter direction and abuts against the inclined surface 4a of the sleeve 4 so that the sleeve 4 is moved. Hold it moved to the middle left.

[Automatic disconnection operation by strong pulling force] When a strong pulling force of a predetermined value or more acts on the plug P side of the pipe joint in the connection state shown in FIG. 4 described above, in FIG. Is pulled, and the spring holder 24 is locked to the adapter 21 via the C-shaped retaining ring 25, so that the socket body 1 moves to the state shown in FIG. At this time, the stop ring 26 provided on the sleeve 4 prevents the sleeve 4 from coming out of the sleeve 4 and the socket body 1 deflects and moves the sleeve spring 3. P automatically leaves socket S.

After the detachment, on the socket S side, due to the residual pressure in the hose (not shown), the backflow prevention valve 12 bends and moves the valve spring 14 as shown in FIG. The ring 13 contacts the sealing surface 9a formed on the inner circumference of the rear cylinder 1B, closes the flow path, and prevents the residual gas in the hose from leaking. In order to close the check valve 12 due to the extremely low residual pressure in the hose, the force of the valve spring 14 should be set small. On the side of the detached plug, the valve body 28 closes the flow path by the urging force of the valve spring 29, thereby preventing fluid leakage.

Note that, in the present pipe joint, the automatic releasing force also changes depending on the pressure of the fluid flowing in the pipe joint. That is, in this pipe joint, when the pressure in the joint is zero, the automatic detaching force requires a tensile force equivalent to bending the coil spring 23 (actually, the tensile load is 30 kgf).
However, when a fluid pressure acts on the pipe joint, the fluid pressure generates a surface pressure in the adapter 21 to the left in FIGS. As a result, a force in the same direction acts when the fluid pressure is applied. As a result, when the fluid pressure is acting, the actual automatic release force is smaller than when the fluid pressure is not applied (actual Has a pressure of 15.6K
At the time of gf / cm ² , the tensile load is released at 5 kgf).
In this way, in the present socket S, the automatic release force can be set large when no fluid pressure is applied, and when the fluid pressure is applied, the automatic release force is changed by the fluid pressure,
Safety can be improved.

[When the downstream hose is damaged without disconnecting the pipe joint] If the downstream hose is damaged while the pipe joint is connected, a pressure difference is generated at the end face of the overflow prevention valve 16. That is, the pressure from the pressure source and the residual pressure in the damaged but side hose act on the end face of the overflow prevention valve 16, and a pressure difference is generated by both. Due to this pressure difference, as shown in FIG. 7, the overflow prevention valve 16 bends and moves the valve spring 18, and the overflow prevention valve 16
The ring 17 is brought into contact with a seal surface 19 a formed on the inner periphery of the valve guide 19 to shut off the flow path. As a result, even if the hose on the downstream side of the pipe joint is damaged, excessive outflow of the fluid from the pressure source is prevented.

In the above example, the automatic release force is determined not only by the force of the coil spring 23 but also by the adapter 2
1 can be set freely depending on the relationship between the O-ring 22 provided in 1 and the fluid pressure in the pipe joint, so that the detaching force can be set freely according to the place of use. In addition, the front cylinder and the rear cylinder are formed of different members, and they are fixed by screw connection. However, both may be formed integrally. The present invention may be embodied in various other forms without departing from its spirit or main characteristics,
The foregoing embodiments are merely illustrative in every respect and should not be construed as limiting.

[0027]

As described in detail above, according to the present invention,
Separation of the coil spring for connection to the hose and the coil spring for automatic disconnection, so that the operating force when connecting the hose can be reduced, but the tensile load for automatic disconnection can be freely determined by the setting method of the coil spring for disconnection. Can be. When an excessive tensile load is applied to the fitting, the socket and the plug are automatically separated. When the fitting is separated, the flow path on the plug side is closed by the valve body inside the plug, and the socket side remains inside the hose. The pressure closes the backflow prevention valve to prevent fluid leakage. Furthermore, even if the hose is damaged on the downstream side of the pipe joint when the pipe joint is in the connected state, the overflow prevention valve in the socket is closed, so that the fluid can be prevented from flowing out, and the safety is extremely high. Further, it is possible to obtain excellent effects such as that the automatic detaching force of the pipe joint can be determined by the fluid pressure acting inside the pipe joint.

[Brief description of the drawings]

FIG. 1 is a half sectional view of a socket side of a pipe joint according to an embodiment.

FIG. 2 is an enlarged view of a portion A in FIG.

FIG. 3 is a half sectional view on the plug side of the pipe joint according to the present embodiment.

FIG. 4 is a half sectional view showing a state where a socket and a plug of the pipe joint according to the present embodiment are connected.

FIG. 5 is a half sectional view of a state in which the socket and the plug of the pipe joint according to the present embodiment are automatically detached from a state where the socket and the plug are connected.

FIG. 6 is a half sectional view showing a state in which a check valve is closed by residual pressure in the pipe joint according to the present embodiment.

FIG. 7 is a half cross-sectional view of the pipe joint according to the present embodiment in a state where an overflow prevention valve is closed by a pressure on a pressure source side.

FIG. 8 is a sectional view of a conventional pipe joint.

[Explanation of symbols]

 S Socket P Plug 1 Socket body 1A Front cylinder 1B Rear cylinder 2 Locking member (ball) 3 Sleeve spring 4 Sleeve 7 Collar 8 Coil spring 9a Seal surface 9b Contact surface 9c Step 9d Groove 12 Backflow prevention valve 14 Valve Spring 15 Valve contact member (spacer) 16 Overflow prevention valve 18 Valve spring 19 Valve guide 19a Seal surface 21 Adapter 23 Coil spring 24 Spring holder 26 Stop ring 27 Plug body 28 Valve body

Claims (4)

[Claims] A socket and a plug can be connected by engagement of a locking member provided on a socket main body with an engagement recess formed on a plug main body, and the socket can be slid in an axial direction on an outer peripheral portion of the socket main body. A pipe joint capable of engaging and disengaging the locking member with an engagement recess of the plug by operating a fitted sleeve, wherein the locking member is formed by sliding the sleeve between the socket body and the sleeve. A sleeve spring is provided to stop the movement in the outer diameter direction, and a spring holder is slidably fitted in the axial direction on the outer periphery of the socket body,
The spring holder is provided with an adapter that can be brought into contact with and separated from the socket main body, and a coil spring that always contacts the socket main body and the adapter is disposed between the spring holder and the socket main body. Further, one end of a spring holder is provided so as to be engageable with the sleeve, and the socket body and the adapter resist the urging force of the coil spring when a tensile force of a predetermined value or more acts on the socket and the plug. The spring holder is locked to the adapter and the spring holder and the sleeve are held in the locked state, and the sleeve is moved in the pulling direction against the urging force of the sleeve spring. A pipe joint characterized in that the restraint in the outer diameter direction can be released. 2. A backflow prevention valve which can close a flow path in the socket body by a fluid pressure on the downstream side of the pipe joint inside the socket body and a flow path in the socket body by the fluid pressure on the upstream side of the pipe joint. The pipe joint according to claim 1, further comprising an overflow prevention valve capable of closing the valve. 3. A valve abutting member is provided inside the socket body, a backflow prevention valve biased by a spring is abutted on one side of the valve abutting member, and is further biased on the other side by a spring. When the reverse flow prevention valve moves against the urging force of the spring due to the fluid pressure acting on the valve, the reverse flow prevention valve comes into contact with the seal surface formed on the inner circumference of the inner cylinder to close the flow path. The overflow prevention valve is configured to close the flow path by contacting a seal surface formed on the inner circumference of the inner cylinder when the overflow prevention valve moves against the urging force of the spring by the fluid pressure acting on the valve. The pipe joint according to claim 2, wherein: 4. A sleeve in which a socket and a plug can be connected by engagement of a locking member provided on a socket body with an engagement recess formed on a plug body, and wherein the locking member is fitted to an outer peripheral portion of the socket body. A valve abutting member is provided inside the socket body of the pipe joint that can be disengaged from and engaged with the recess by operation, and a backflow prevention valve biased by a spring abuts one side of the valve abutting member, Further, an overflow prevention valve urged by a spring abuts on the other side, and the backflow prevention valve is formed on the inner periphery of the socket body when it moves against the urging force of the spring by fluid pressure acting on the valve. It is configured to close the flow path by contacting the sealing surface,
Also, the overflow prevention valve is configured to close the flow path by abutting against a sealing surface formed on the inner periphery of the socket body when the overflow prevention valve moves against the urging force of the spring by the fluid pressure acting on the valve. And pipe fittings.