Can the Plug with shut-off valve of diagnostic quick-connector with GW NPT, ISO 15171-1 be connected to the socket while the system is under low pressure (a few bars)?

Yes . the Plug with shut-off valve of diagnostic quick-connector with GW NPT, ISO 15171-1 can be connected to the socket while the system is under low pressure (a few bars). The product description explicitly states that connection should occur when the system is not operating, with no pressure or very low pressure of a few bars. The couplings are fitted with shut-off valves and flat sealing faces to ensure leakâfree connection/disconnection and minimal oil loss or air inclusion (approx. 0.1 ml leakage on disconnection, 0.02 ml air inclusion on connection). For safe and proper operation, ensure valve surfaces are clean before connecting.

Is the Plug with shut-off valve of diagnostic quick-connector with GW NPT, ISO 15171-1 suitable for use at system vacuum down to 0.9 bar?

Yes. The Plug with shut-off valve of diagnostic quick-connector with GW NPT, ISO 15171-1 is suitable for use at system vacuum down to 0.9 bar. The product specification explicitly states "Vacuum: up to 0.9 bar," and its valve design, sealing (NBR) and flat sealing surfaces minimize residual oil leakage (~0.1 ml) and air inclusion (~0.02 ml), supporting reliable operation at that vacuum level. Ensure valve surfaces are kept clean for proper performance.

Does the Plug with shut-off valve of diagnostic quick-connector with GW NPT, ISO 15171-1 require specific cleaning procedures for valve surfaces?

Yes. The Plug with shut-off valve of diagnostic quick-connector with GW NPT, ISO 15171-1 requires specific cleaning procedures for valve surfaces. To ensure proper operation, leak-free connection/disconnection, and to minimize residual oil leakage and air inclusion, valve faces must be kept clean and free of debris, dirt, metal particles, and hardened residues. Recommended practices: - Clean only when system is depressurized (no pressure or very low pressure). - Use lint-free, oil-compatible wipes and a suitable solvent compatible with NBR seals (e.g., light petroleum solvent or manufacturer-recommended hydraulic cleaner). Avoid aggressive solvents that swell or degrade NBR. - Remove visible contaminants, then dry with a clean lint-free cloth or allow solvent to evaporate fully. - Inspect sealing surfaces for nicks, scratches, corrosion or damage; replace plug if surfaces are compromised. - Prevent recontamination by handling with clean gloves and keep protective caps/covers on plugs when not connected. - Ensure ambient cleanliness before connection to avoid introducing particles into the system. Following these procedures preserves sealing integrity at working pressure (400 bar), maintains minimal leakage (~0.1 ml) and air inclusion (~0.02 ml), and helps meet ISO 15171-1 performance expectations.

Plug with shut-off valve of diagnostic quick-connector with GW NPT, ISO 15171-1

All products, Quick-connect measurement fittings/

Additional information

Material	CS – steel (cast iron)

Plug with shut-off valve for diagnostic quick coupling, with internal NPT thread, used for pressure measurement in hydraulic systems. Manufactured according to ISO 15171-1 and SAE J1502 standards, interchangeable with connectors from other manufacturers. Quick coupling plugs made of hardened steel are typically permanently installed in the hydraulic system, while the quick coupling sockets remain connected by a hose to the pressure gauge. The connection of the socket to the plug should only occur when the system is not operating, with no pressure or very low pressure of a few bars. The working pressure for the plug not connected to the socket is 400 bar, and the minimum burst pressure is 1600 bar. The working pressure for the connected socket and plug is also 400 bar, while the minimum burst pressure is 1300 bar. The socket and plug are equipped with valves that ensure leak-free connection and disconnection as well as sealing. Their flat surfaces minimize residual oil leakage and air inclusion into the system (leakage approx. 0.1 ml during disconnection, air inclusion approx. 0.02 ml during connection). For proper operation, it is essential to maintain the cleanliness of the valve surfaces. Working pressure: 400 bar. Burst pressure: 1300 bar. Vacuum: up to 0.9 bar. Hydraulic oil flow at Δp = 3 bar: 4.2 [l/min]. Material: galvanized steel. Sealing: NBR. Operating temperature: from -40°C to +120°C.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Price	Quantity	Actions	Catalogue
PC-PD1F1	PD quick-connect measurement plug with 1/8" NPT thread	-	400	In stock	0 zł		Enquiry
PC-PD1F2	PD quick-connect measurement plug with 1/4" NPT thread	-	400	In stock	0 zł		Enquiry

Do you need a larger quantity of products or a bespoke quote?

Call us: +48 61 653 02 22 or email us: tubes@tubes-international.com

SEND ENQUIRY

Plug with shut-off valve for diagnostic quick coupling, with internal NPT thread, used for pressure measurement in hydraulic systems. Manufactured according to ISO 15171-1 and SAE J1502 standards, interchangeable with connectors from other manufacturers. Quick coupling plugs made of hardened steel are typically permanently installed in the hydraulic system, while the quick coupling sockets remain connected by a hose to the pressure gauge. The connection of the socket to the plug should only occur when the system is not operating, with no pressure or very low pressure of a few bars. The working pressure for the plug not connected to the socket is 400 bar, and the minimum burst pressure is 1600 bar. The working pressure for the connected socket and plug is also 400 bar, while the minimum burst pressure is 1300 bar. The socket and plug are equipped with valves that ensure leak-free connection and disconnection as well as sealing. Their flat surfaces minimize residual oil leakage and air inclusion into the system (leakage approx. 0.1 ml during disconnection, air inclusion approx. 0.02 ml during connection). For proper operation, it is essential to maintain the cleanliness of the valve surfaces. Working pressure: 400 bar. Burst pressure: 1300 bar. Vacuum: up to 0.9 bar. Hydraulic oil flow at Δp = 3 bar: 4.2 [l/min]. Material: galvanized steel. Sealing: NBR. Operating temperature: from -40°C to +120°C.