Ball valve instruction

Ball Valve Instructions 1. Scope: This manual applies to electric (or pneumatic) ball valves at flanged ends.
2. Composition: It consists of an electric (or pneumatic) actuator (20) and a ball valve body part connected to the bracket (18) and the connecting shaft (17).
3. Use limit temperature and pressure limit l The nameplate shows the large operating pressure of the ball that is allowed under the small operating temperature of Zui Da and Zui.
l Use PTFE or RTFE seat and seals, operating temperature should be between -290C and 2000C. Operating temperatures for other types of seats and seals are subject to inspection by the KI facility.
l The nominal pressure rating (PN) of the valve indicates the large working pressure of the valve at normal temperature. (Example: PN4.0, indicating that the operating temperature of zui at -290C to 380C is 40 Bar (4.0 MPa)).
l For the notes on electric or pneumatic actuators, refer to their respective instructions.
4. Installation 1) Remove the protective cover on both sides of the flange end and clean it with the valve fully open.
2) Before installation, the whole machine test should be carried out according to the specified signal (electricity or gas) (to prevent the use of vibration due to transportation). After passing the test, it can be installed on the line (wiring according to the electric actuator circuit diagram).
3) Before installing the pipe, flush and remove the remaining impurities in the pipe (these materials may damage the seat and the ball).
4) During installation, please do not use the actuator part of the valve as a lifting point for lifting to avoid damage to the actuator and accessories. .
5) This type of valve should be installed in the horizontal or vertical direction of the pipe.
6) The pipe near the installation point should not have the phenomenon of drooping or bearing external force. Pipe brackets or supports can be used to eliminate the deviation of the pipeline.
7) After connecting with the pipe, cross-tighten the flange connection bolt with the specified torque.
4. Operation and use 1) Confirm that the pipeline and valve have been flushed before operation.
2), the operation of the valve according to the size of the input signal of the actuator to drive the rotation of the valve stem: when the forward rotation of 1/4 turn (900), the valve is closed. The valve opens when the 1/4 turn (900) is rotated in the opposite direction.
3) When the actuator direction indicator arrow is parallel to the pipeline, the valve is open; when the indicator arrow is perpendicular to the pipeline, the valve is closed.
5. Maintenance has a long service life and maintenance-free period, which will depend on the following factors: normal working conditions, maintaining a harmonious temperature/pressure ratio, and reasonable corrosion data.
● When the ball valve is closed, there is still a pressurized fluid inside the valve body. ● Before the maintenance, the line pressure is released and the valve is in the open position. ● Before the maintenance, disconnect the power supply or air supply. ● Before the maintenance, disconnect the actuator from the bracket. The packing should be locked again. l If there is micro-bleedage at the packing culvert, the stem nut (13) must be locked again.
l Be careful not to lock too tightly, usually lock 1/4 turn to 1 turn, the leak will stop.
2), replace the valve seat and seals.
A), disassemble l to make the valve in the half open position, flush and clear dangerous substances that may exist inside and outside the valve.
l Close the ball valve, remove the connecting bolts and nuts on the flanges on both sides, and then completely remove the valve from the line.
l Disassemble the drive unit-actuator (20), connecting bracket (18), lock washer (14), stem nut (13), butterfly shrapnel (12), Glam (11), wear-resistant piece (10), stem packing (9)
l Remove the body cover connecting bolt (5) and nut, separate the bonnet from the valve body, and remove the bonnet gasket (16).
l Confirm that the ball (3) is in the “OFF” position, which makes it easier to remove it from the valve body and then remove the seat.
l Push the valve stem (6) down from the hole in the valve body until it is completely removed, then remove the O-ring (8) and the stem under the packing (7)
Note: Please be careful to avoid scratching the stem surface and the sealing body of the valve body packing B), reassembling l cleaning and inspection to remove the parts. It is strongly recommended to replace the valve seat and bonnet gasket with spare parts package. l Assemble in the reverse order of disassembly.
l Cross-tighten the flange connection bolts (5) with the specified torque.
l Lock the stem nut (13) with the specified torque
l After installing the actuator, input the corresponding signal to rotate the spool through the rotary valve stem to open the valve to the open and closed positions.
l If possible, perform pressure sealing test and performance test on the valve according to relevant standards before returning the pipe.
Model representation method:
Like the previous valve Q11S-16C, the "S" is an older method, and the "S" stands for a plastic seal. It is now represented by "F". It stands for PTFE or PTFE.