STOP STP-U Brass Pneumatic Shut-Off Valve with Check Valve and Plug-In Connector

Q: What is the maximum operating pressure for the STOP STP-U Brass Pneumatic Shut-Off Valve with Check Valve and Plug-In Connector?

The maximum operating pressure for the STOP STP-U Brass Pneumatic Shut-Off Valve with Check Valve and Plug-In Connector is 10 bar.

Q: How does the integrated check valve in the STOP STP-U Brass Pneumatic Shut-Off Valve with Check Valve and Plug-In Connector prevent actuator movement during pressure loss?

The integrated check valve in the STOP STP-U Brass Pneumatic Shut-Off Valve with Check Valve and Plug-In Connector prevents actuator movement during pressure loss by mechanically blocking reverse airflow when the control pressure is absent. Under normal operation the solenoid-controlled shut-off permits supply air to flow to the actuator. If the control signal or system pressure drops, the check valve immediately closes, sealing the actuator port and stopping any downstream air from escaping or leaking back into the supply. This trapped volume of air holds the actuator in its last safe position, preventing unintended motion. The robust nickel-plated brass body and NBR sealing ensure a tight, reliable seal under the device’s operating range (0.5–10 bar, -10°C to +60°C), so the check valve consistently engages to secure the actuator and maintain process safety during pressure loss.

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Additional information

Material	B – brass (bronze)

The STOP shut-off valve series STP-U with integrated check valve and convenient plug-in connection is designed to provide maximum safety and reliability in pneumatic systems. Acting as a protective element, it ensures that airflow to the actuator is enabled only when a pneumatic control signal is present, immediately stopping the actuator in case of pressure loss. With an operating pressure range from 0.5 to 10 bar and a temperature tolerance between -10°C and +60°C, this valve guarantees consistent performance even under demanding conditions. The robust nickel-plated brass body offers excellent durability and resistance to wear, while the NBR sealing ensures tightness and long-lasting operation. Easy to install and highly efficient, the STP-U series is the ideal solution for industries seeking dependable safety components that enhance system reliability, minimize downtime, and optimize overall process security.

List of product variants

Article number	Product variant name	Nominal inner diameter	Working pressure [bar]
MW-W6001001106	STOP valve with STP-U check valve, 6 mm hose / GZ 1/8", pilot GW M5	-	10
MW-W6001011106	STOP valve with STP-U check valve, 6 mm hose / GZ 1/4", pilot GW 1/8"	-	10
MW-W6001011108	STOP valve with STP-U check valve, 8 mm hose / GZ 1/4", pilot GW 1/8"	-	10
MW-W6001021108	STOP valve with STP-U check valve, 8 mm hose / GZ 3/8", pilot GW 1/8"	-	10
MW-W6001021110	STOP valve with STP-U check valve, hose 10 mm / GZ 3/8", pilot GW 1/8"	-	10
MW-W6001031112	STOP valve with STP-U check valve, hose 12 mm / GZ 1/2", pilot GW 1/8"	-	10

The STOP shut-off valve series STP-U with integrated check valve and convenient plug-in connection is designed to provide maximum safety and reliability in pneumatic systems. Acting as a protective element, it ensures that airflow to the actuator is enabled only when a pneumatic control signal is present, immediately stopping the actuator in case of pressure loss. With an operating pressure range from 0.5 to 10 bar and a temperature tolerance between -10°C and +60°C, this valve guarantees consistent performance even under demanding conditions. The robust nickel-plated brass body offers excellent durability and resistance to wear, while the NBR sealing ensures tightness and long-lasting operation. Easy to install and highly efficient, the STP-U series is the ideal solution for industries seeking dependable safety components that enhance system reliability, minimize downtime, and optimize overall process security.