Does the STOP STP-U Brass Pneumatic Shut-Off Valve with Built-In GW Check Valve prevent actuator movement during sudden pressure loss?

Yes. The STOP STP-U Brass Pneumatic Shut-Off Valve with Built-In GW Check Valve prevents actuator movement during sudden pressure loss. It allows airflow only when a pneumatic control signal is present and instantly halts the actuator if pressure is lost. The integrated GW check valve and internal design maintain safety and reliability across 0.5–10 bar and −10°C to +60°C, ensuring the actuator is held securely when supply pressure drops.

Can the STOP STP-U Brass Pneumatic Shut-Off Valve with Built-In GW Check Valve be used in systems operating below 0.5 bar or above 10 bar without compromising safety?

The STOP STP-U Brass Pneumatic Shut-Off Valve with Built-In GW Check Valve is specified for an operating pressure range of 0.5 to 10 bar. Using it below 0.5 bar or above 10 bar would place the device outside its rated limits and could compromise safety and performance. Below 0.5 bar the valve may not reliably permit or interrupt flow as intended, risking actuator malfunction; above 10 bar the valve and internal seals (NBR) and components may be overstressed, risking leakage, failure of the check function or mechanical damage. For safe operation, remain within the stated 0.5–10 bar range and -10°C to +60°C temperature limits; for applications outside these bounds consult the manufacturer for a suitable alternative or validated modifications.

STOP STP-U Brass Pneumatic Shut-Off Valve with Built-In GW Check Valve

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Additional information

Material	B – brass (bronze)

The STOP shut-off valve series STP-U with integrated check valve and internal thread is designed to ensure maximum safety and reliability in pneumatic systems. Acting as a protective element, it permits airflow exclusively when a pneumatic control signal is present, instantly halting the actuator in case of pressure loss. With an operating range from 0.5 to 10 bar and a temperature tolerance between -10°C and +60°C, it guarantees consistent performance even under demanding conditions. The robust nickel-plated brass body provides excellent durability and resistance to wear, while the NBR sealing ensures tightness and long-lasting efficiency. Compact, efficient, and easy to integrate, the STP-U series is the ideal solution for applications requiring dependable actuator control and enhanced operational safety.

List of product variants

Article number	Product variant name	Nominal inner diameter	Working pressure [bar]
MW-W6001001001	STOP valve with STP-U check valve, G 1/8" / GZ 1/8", pilot G M5	-	10
MW-W6001011011	STOP valve with STP-U check valve, G 1/4" / GZ 1/4", pilot G 1/8"	-	10
MW-W6001021021	STOP valve with STP-U check valve, G 3/8" / GZ 3/8", pilot G 1/8"	-	10

The STOP shut-off valve series STP-U with integrated check valve and internal thread is designed to ensure maximum safety and reliability in pneumatic systems. Acting as a protective element, it permits airflow exclusively when a pneumatic control signal is present, instantly halting the actuator in case of pressure loss. With an operating range from 0.5 to 10 bar and a temperature tolerance between -10°C and +60°C, it guarantees consistent performance even under demanding conditions. The robust nickel-plated brass body provides excellent durability and resistance to wear, while the NBR sealing ensures tightness and long-lasting efficiency. Compact, efficient, and easy to integrate, the STP-U series is the ideal solution for applications requiring dependable actuator control and enhanced operational safety.