How does the STOP STP-BX shut-off valve with GW and plug-in connector, brass, behave if control pressure slowly drops below the operating range?

If control pressure slowly falls below the operating range (0.5 bar) the STOP STP-BX shut-off valve with GW and plug-in connector, brass will gradually close and cut off supply air to the actuator. Because it is designed to allow airflow only when a pneumatic control signal is present, a drop below the minimum operating pressure causes the valve to stop passing air; the actuator will be brought to a stopped/safe state as control pressure falls. With NBR sealing and nickel-plated brass body, the closure is reliable across the specified temperature range (â10Â°C to +60Â°C), but very slow leaks or borderline pressures near 0.5 bar may lead to partial or unstable actuator response before full shut-off.

Can the STOP STP-BX shut-off valve with GW and plug-in connector, brass be used with media outside -10Â°C to +60Â°C?

No. The STOP STP-BX shut-off valve with GW and plug-in connector, brass is specified for an operating temperature range of -10Â°C to +60Â°C. Using it with media colder than -10Â°C or hotter than +60Â°C would be outside the manufacturer's stated limits and may compromise sealing (NBR), materials (nickel-plated brass) and reliable operation. For applications outside this range select a valve rated for the required temperatures or consult the manufacturer for a suitable alternative.

STOP STP-BX shut-off valve with GW and plug-in connector, brass

Q: What maintenance is required for the STOP STP-BX shut-off valve with GW and plug-in connector, brass to ensure reliable operation?

For reliable operation of the STOP STP-BX shut-off valve with GW and plug-in connector, brass: - Regular visual inspection: check for external damage, corrosion on the nickel-plated brass body and on the plug-in connector; verify threads and GW connection are secure. - Leak test: periodically pressurize the system (0.5â10 bar) and check for leaks at joints and seals; replace if leakage is detected. - Seal check/replacement: inspect NBR sealing for wear, hardening or swelling, especially after exposure to contaminants or temperature extremes; replace seals if compromised. - Electrical/connector check: ensure plug-in connector contacts are clean, dry and corrosion-free; verify secure electrical connection and insulation. - Functional test: cycle the valve with the pneumatic control signal to confirm it opens only when control pressure is present and reliably shuts off after pressure drop. - Environment/service intervals: increase inspection frequency in harsh or dirty environments; follow manufacturerâs recommended intervals if available. Keep operating conditions within -10Â°C to +60Â°C and 0.5â10 bar.

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Additional information

Material	B – brass (bronze)

STOP shut-off valve series STP-BX with internal thread and plug connection used mainly as a safety valve. When installed on the actuator’s supply connection, it allows airflow only in the presence of a pneumatic control signal. The actuator is stopped after a drop in control pressure. Operating pressure: 0.5 ÷ 10 bar. Operating temperature: from -10°C to +60°C. Body material: nickel-plated brass. Sealing: NBR.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
MW-W6001101002	STOP valve STP-BX, G 1/8" / GZ 1/8", pilot hose 4 mm	-	10	In stock	Enquiry
MW-W6001111012	STOP valve STP-BX, G 1/4" / GZ 1/4", pilot hose 4 mm	-	10	In stock	Enquiry
MW-W6001121022	STOP valve STP-BX, G 3/8" / GZ 3/8", pilot hose 4 mm	-	10	In stock	Enquiry

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STOP shut-off valve series STP-BX with internal thread and plug connection used mainly as a safety valve. When installed on the actuator’s supply connection, it allows airflow only in the presence of a pneumatic control signal. The actuator is stopped after a drop in control pressure. Operating pressure: 0.5 ÷ 10 bar. Operating temperature: from -10°C to +60°C. Body material: nickel-plated brass. Sealing: NBR.