Installation, use, and maintenance

1. Installation

When the valve is used at room temperature (≤ 80°C) in gas or low viscosity liquid media, it is the same as the usual pneumatic film control valve installed upright on a horizontal pipe, as shown in the figure below.

A.ZZYP-16B Type Self-operated pressure regulating valve

1. Globe valve  2. Pressure Gauge   3. Filter  4. Self-operated pressure regulating valves        5. Pressure Gauge

If the medium used is steam, the self-operated pressure regulating valve should be installed upside down on a horizontal pipe, as shown below.

When installing, pay attention to the following points：

1. The condenser must be above the actuator of the regulator and below the post-valve (post-valve regulator) or pre-valve (pre-valve regulator) receiver to ensure that the condenser is filled with condensate.
2. The pressure point should be taken at a suitable location from the regulator, the pre-valve regulator should be greater than two times the diameter of the pipe, and the post-valve regulator should be more significant than six times the diameter of the tube.
3. on-site maintenance and operation, the regulator should be surrounded by appropriate space, and a

Note： The dotted line in the diagram indicates the alternative permissible orientation of the pipe entrances and exits

4. If the diameter of the regulator is too large (DN ≥ 100), there should be a fixed bracket.

5. The direction of media flow is the same as the arrow on the valve body. The center of the pipe before and after should be aligned with the center of the two flanges of the regulator to avoid excessive stress on the valve body.

6. A filter should be installed in front of the valve to prevent blockage by impurities in the medium.

7. Control valves should be installed at ambient temperatures not exceeding -25°C to 55°C.

2. Use

Operating procedures when using gases or low viscosity liquids at room temperature：

1. Slow opening of the shut-off valve before and after the valve.
2. Loosen the vent plug until the gas or liquid escapes from the actuator.
3. Then retighten the vent plug, and the regulator is ready for operation. The required pressure value can be obtained by adjusting the pressure regulating disc. When revising, pay attention to the pressure indication and move slowly so that the valve stem does not follow the rotation.

Operating procedures when using steam：

1. Unscrew the liquid filling port screw from the condenser.
2. Unscrew the actuator exhaust plug.
3. Use the leaky tip to add water through the fill port until it flows out of the vapor discharge hole.
4. Tighten the venting plug and continue filling until it overflows the fill port.
5. Tighten the liquid filler screw.
6. Slowly open the shut-off valves before and after the regulator.
7. Adjust the pressure adjustment dial and observe the pressure indication until the required value is reached.

Maintenance

After the control valve is put into operation, the general maintenance workload is minimal, usually as long as the observation of the valve before, after the valve pressure value is in line with the process. The required value can be observed. In addition, keep whether the stuffing box and the actuator are leaking, and if they are leaking, tighten or replace the packing and diaphragm.