How does the STOP STP-U brass pneumatic shut-off valve with check valve with plug-in connector respond when control pressure drops while installed on an actuator?

When control pressure drops while the STOP STP-U brass pneumatic shut-off valve with check valve with plug-in connector is installed on an actuator, the valve immediately cuts off the supply airflow to the actuator because it only allows flow when the pneumatic control signal is present. Simultaneously, the integrated check valve prevents backflow from the actuator side, holding its last position or pressure. As a result, the actuator is stopped when control pressure falls. The valve operates reliably within 0.5â10 bar and â10Â°C to +60Â°C; body is nickelâplated brass with NBR sealing.

Can the STOP STP-U brass pneumatic shut-off valve with check valve with plug-in connector prevent actuator movement if supply pressure falls below 0.5 bar?

Yes. The STOP STP-U brass pneumatic shut-off valve with check valve with plug-in connector is designed as a safety shut-off: when installed on the actuator supply port it only permits airflow while a pneumatic control signal is present. With an operating pressure range of 0.5â10 bar, it will stop the actuator after a drop in control pressure. However, because the specified minimum operating pressure is 0.5 bar, reliable shut-off/prevention of actuator movement cannot be guaranteed if system pressure falls below 0.5 bar; performance may be impaired at or under that threshold.

Does the STOP STP-U brass pneumatic shut-off valve with check valve with plug-in connector require a specific plug type for actuator installation?

No. the STOP STP-U brass pneumatic shut-off valve with check valve with plug-in connector does not require a specially specified plug type for actuator installation beyond a compatible pneumatic electrical connector. The built-in plug-in connector is designed to interface with standard pneumatic actuator control fittings: it provides a quick electrical/pneumatic mating to allow airflow only when a pneumatic control signal is present. Ensure the actuatorâs connector matches the valveâs plug-in configuration (size, pin arrangement and sealing) and that materials and ratings are compatible with the valveâs operating limits (0.5â10 bar, â10Â°C to +60Â°C, NBR sealing). If in doubt, confirm connector dimensions and electrical/pneumatic pinout with the valve or actuator supplier to guarantee proper fit and safe operation.

Valve shut-off pneumatic brass alloy STP-U with valve check of coupling push-in

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Additional information

Material	B – brass (bronze)

Valve shut-off alloy series STP-U with valve check with coupling push-in used mainly as safety valve. When mounted on the supply connections of the actuator, it allows air flow only in the presence of a pneumatic control signal. The actuator is stopped after a drop in the control pressure. pressure working: 0.5 ÷ 10 bar. Operating temperature: from -10°C to +60°C. Material the body: brass nickel-plated. Sealing: NBR.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
MW-W6001001106	Valve STOP with a valve check STP-U, hose 6 mm / 1/8" male, pilot M5 female	-	10	In stock	Enquiry
MW-W6001011106	Valve STOP with a valve check STP-U, hose 6 mm / 1/4" male, pilot 1/8" female	-	10	In stock	Enquiry
MW-W6001011108	Valve STOP with a valve check STP-U, hose 8 mm / 1/4" male, pilot 1/8" female	-	10	In stock	Enquiry
MW-W6001021108	Valve STOP with a valve check STP-U, hose 8 mm / 3/8" male, pilot 1/8" female	-	10	In stock	Enquiry
MW-W6001021110	Valve STOP with a valve check STP-U, hose 10 mm / 3/8" male, pilot 1/8" female	-	10	In stock	Enquiry
MW-W6001031112	Valve STOP with a valve check STP-U, hose 12 mm / 1/2" male, pilot 1/8" female	-	10	In stock	Enquiry

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Valve shut-off alloy series STP-U with valve check with coupling push-in used mainly as safety valve. When mounted on the supply connections of the actuator, it allows air flow only in the presence of a pneumatic control signal. The actuator is stopped after a drop in the control pressure. pressure working: 0.5 ÷ 10 bar. Operating temperature: from -10°C to +60°C. Material the body: brass nickel-plated. Sealing: NBR.