Flow-rate control valve

摘要

The present invention provides a flow-rate control valve that allows for manufacturing cost reduction and has a compact size with improved ease of maintenance. The flow-rate control valve includes a lower casing provided with a channel that leads a liquid and a fluid and with a valve seat, a valve body that controls, in conjunction with the valve seat, the flow rate of the liquid and the fluid that pass through the channel, a reciprocating drive part that moves the valve body closer to or away from the valve seat, and an upper casing that houses the reciprocating drive part.

主权项

1. A flow-rate control valve comprising:
a lower casing including a channel that leads a liquid and fluid, and a valve seat;
a valve body that controls, in conjunction with the valve seat, a flow rate of the liquid and the fluid that pass through the channel; a linear stepping motor connected to a reciprocating drive part that controls and moves the valve body in a direction closer to or away from the valve seat linearly; and an upper casing housing the reciprocating drive part, wherein the valve body includes: a flange coupled by a bellows to a fitting portion providing selective engagement in which the valve body including the fitting portion is engaged with the valve seat in various positions to vary the flow rate; and an insertion hole that receives a shaft body extending from the reciprocating drive part, and wherein the flange has a substantially disk shape; and a communication portion extending through inside the flange, and the communication portion linking the inside of the insertion hole with air.