How does the STP Pneumatic Shut-Off Valve L 2/2 (Thread to Hose) operate to block exhaust and allow actuator supply airflow?

The STP Pneumatic Shut-Off Valve L 2/2 (Thread to Hose) permits actuator supply airflow while blocking exhaust by using a spring-loaded internal seat that stays open for supply pressure and closes the exhaust path until a control signal is applied. Installed directly into the actuator’s supply port (thread with O‑ring on one side, plug‑in hose on the other), the valve allows unrestricted flow into the actuator working chamber under normal supply pressure. The exhaust passage is held blocked by the internal mechanism so the actuator remains pressurized and cannot vent. When control pressure is applied to the Ø4 (Ø5/32”) plug‑in port, this pressure shifts the internal element, unseating the exhaust path and permitting venting. Designed for up to 10 bar and −20°C to +60°C, it works with filtered compressed air (lubricated or non‑lubricated) for reliable, safe operation in pneumatic systems.

Can the STP Pneumatic Shut-Off Valve L 2/2 (Thread to Hose) be used with both lubricated and non-lubricated compressed air without affecting performance?

Yes. The STP Pneumatic Shut-Off Valve L 2/2 (Thread to Hose) is specified for use with filtered compressed air, both lubricated and non-lubricated, without affecting performance. Its robust construction, O-ring threaded connection and plug-in port ensure reliable sealing and operation up to 10 bar and across a wide temperature range (-20°C to +60°C). When installed into the actuator supply port, it provides unrestricted inlet flow and positively blocks exhaust until control pressure is applied, maintaining dependable performance in demanding applications regardless of lubrication. Ensure the air is properly filtered and within the stated pressure and temperature limits for optimal longevity.

STP Pneumatic Shut-Off Valve L 2/2 (Thread to Hose)

All products, Functional fittings/

Additional information

Material	P – material (plastic)

The STP L 2/2 cut-off valve is a reliable and efficient solution designed for precise control of pneumatic systems, ensuring safe and optimized operation of actuators. Featuring a robust construction with a threaded connection equipped with an O-ring on one side and a convenient plug-in connection on the other (thread-to-hose), it allows for quick and secure installation directly into the actuator’s supply port. The valve ensures unrestricted airflow into the actuator’s working chamber while effectively blocking exhaust unless control pressure is applied to the Ø4 (Ø5/32”) plug-in port, guaranteeing dependable performance in demanding applications. Engineered for an operating pressure of up to 10 bar and a wide temperature range from -20°C to +60°C, it is suitable for use with filtered compressed air, whether lubricated or non-lubricated. Compact, durable, and easy to integrate, the STP L valve is the ideal choice for enhancing efficiency, safety, and reliability in modern pneumatic systems.

List of product variants

Article number	Product variant name	Nominal inner diameter	Working pressure [bar]
MW-9065708	Stop valve STP L 2/2, GZ BSP 1/8" - hose 6 mm (outlet)	-	10
MW-9065709	Stop valve STP L 2/2, GZ BSP 1/4" - hose 6 mm (outlet)	-	10
MW-9065710	Stop valve STP L 2/2, GZ BSP 1/8" - hose 8 mm (outlet)	-	10
MW-9065711	Stop valve STP L 2/2, GZ BSP 1/4" - hose 8 mm (outlet)	-	10
MW-9065712	Stop valve STP L 2/2, GZ BSP 3/8" - hose 8 mm (outlet)	-	10

The STP L 2/2 cut-off valve is a reliable and efficient solution designed for precise control of pneumatic systems, ensuring safe and optimized operation of actuators. Featuring a robust construction with a threaded connection equipped with an O-ring on one side and a convenient plug-in connection on the other (thread-to-hose), it allows for quick and secure installation directly into the actuator’s supply port. The valve ensures unrestricted airflow into the actuator’s working chamber while effectively blocking exhaust unless control pressure is applied to the Ø4 (Ø5/32”) plug-in port, guaranteeing dependable performance in demanding applications. Engineered for an operating pressure of up to 10 bar and a wide temperature range from -20°C to +60°C, it is suitable for use with filtered compressed air, whether lubricated or non-lubricated. Compact, durable, and easy to integrate, the STP L valve is the ideal choice for enhancing efficiency, safety, and reliability in modern pneumatic systems.