3/8" Union Straight Flow Control Valve

This is a straight union pneumatic flow control valve for one-directional adjustable control of the air flow. It is a combination of a needle valve and an orifice check valve. The needle valve provides it with a flow rate adjustment while the orifice check valve makes sure the air flow is metered in one direction only.

It has 3/8 inch push-in fittings on both sides. The push-in fitting provides an easy connection with the tubing. Push the tube in and the fitting will fix it with stainless steel claws.

The operating pressure ranges from 0.5 to 10 bar (7.25 to 145 psi). It has NBR seals that make it suitable for applications within a temperature range from 0 to 60°C (32 to 140 °F) (no freezing).

Use a rotatable needle to adjust the orifice size that defines the flow rate and fix it with a locknut. Turn the needle in the clockwise direction to reduce and in the counterclockwise to increase the orifice size. When adjusting the flow rate start from the fully closed state to avoid a sudden move of an actuator. Avoid turning the needle with excessive torque, otherwise the flow characteristics may change due to the deformed resin valve seat.

Pros:

• Equipped with a locknut to secure the needle’s position
• Adjustable flow rate
• Equipped with easy to connect push-in fittings

Cons:

• Not suitable for vacuum applications
• Allows some air leakage so avoid using it for the application that requires no leakage

JSMU series

The JSMU – series includes union straight flow control valves for one-directional air flow control. The push-in fitting sizes range from 3 to 12 mm. They also suitable for operating pressure range from 0.5 to 10 bar and check valve cracking pressure of 0.05 bar.