The seat load in predetermined static

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conditions, the net between the closure element and the valve seat contact force. In fact, for a given control valve, the actuator selection is the need for a large force to overcome the static, the stem and the dynamic unbala nce force, and left a margin to a seat load based.

Valve seat ring: a part of the body assembly, closure components provide the seating surface and fluid control port

Spring the adjustment pieces: a pipe, usually spin on the actuator stem or screwed into the bracket inside to adjust the amount of compression spring.solenoid valve air

The spring seat: a plate, holding the spring in place and to provide a way for a plane contacted by the spring adjustment member.

Static unbalance force: under the conditions of a predetermined pressure, and the fluid in a stationary state, since the net force generated by the fluid pressure acting on the closure element and the stem. Stem connections: connecting the actuator stem to the valve stem.

Trim: regulating the charged fluid valve internal parts. Through the valve body, valve parts typically include closure components, s eat ring, cage, valve stem and valve stem pin. Trim, soft seat: with elastic, plastic, or other material easy to deform trim, with the closure component or seat ring, with a minimum of implementing agencies to achieve tight closure.pneumatic control valves