The optimum position for installing the regulator is to […]
The optimum position for installing the regulator is to position the stem in a vertical plane with the actuator above the valve body. If the regulating valve must be installed at a position where the valve stem is moved horizontally, or if the direction of movement of the valve stem is at a certain angle to the horizontal plane, the actuator should be supported so that the various components of the regulating valve are in a natural state. If the support is not added or the support is improperly installed, the valve stem and the valve seat may be distracted, which may cause a fault or a leak of the filler. Even if the regulating valve has fixing and supporting measures, it must be inspected regularly, usually once every 2 to 3 months.
Fillers and oilers need to be re-adjusted after short-term use. In the case of dust, the packing box and the guiding part should be protected by a plastic sleeve or a rubber sleeve around the valve stem. When there is corrosive gas or liquid droplets, special protection measures should be adopted. Generally, the control valve is wrapped with an anti-corrosion bag, but Note that it cannot affect its operation. In the case of fire resistance requirements, special refractory coatings, fireproof bags, etc. may be used. The material of the fireproof bag contains multiple layers of ceramic fibers or glass fibers.
The air source is one of the key energy sources for driving pneumatic control valves. Although the membrane chamber of the pneumatic regulating valve does not consume air, if the air source system contains impurities such as moisture and oil, the valve positioner, the relay, and the like may be blocked and malfunction. Therefore, the gas source and power source must be inspected regularly to ensure that the gas source is clean and dry, and the power supply is reliable.
The special valve bracket of the regulating valve is used to prevent looseness and to ensure the overall vertical position or horizontal position. If transported over long distances, it is best to ship in a solid wooden case.
After the adjustment valve is assembled and painted and attached to the actuator, handwheel, positioner and other accessories as required, in order to prevent foreign matter from entering the regulating valve, all air ports connecting the regulating valve should be blocked, and the connecting flange is equipped with a protective cover. Pay attention to the connection points, such as the position of the valve positioner intake pipe and the actuator interface. Any protruding accessories that are easily damaged, such as oil gauges and potentiometer pressure gauges, should be removed from the joint and packaged separately with the regulator valve.