Can the Socket with shut-off valve for quick-connect diagnostic connector with GW NPT, ISO 15171-1 be connected to the plug under low system pressure (a few bars) without leakage or air inclusion?

Yes. The Socket with shut-off valve for quick-connect diagnostic connector with GW NPT, ISO 15171-1 can be connected to the plug under low system pressure (a few bars) without significant leakage or air inclusion, provided the valve surfaces are clean. Both socket and plug are valve-equipped to ensure leakâfree connection/disconnection and sealing. Their flat sealing faces minimize residual oil loss (~0.1 ml during disconnection) and air inclusion (~0.02 ml during connection). Designed per ISO 15171-1/SAE J1502, with working pressure 400 bar and burst 1300 bar, the coupling is intended to be mated when the system is not operating or under very low pressure. Maintain cleanliness of valve surfaces for proper operation.

Does the Socket with shut-off valve for quick-connect diagnostic connector with GW NPT, ISO 15171-1 require system depressurization before connection to avoid leaks or air ingress?

Socket with shut-off valve for quick-connect diagnostic connector with GW NPT, ISO 15171-1: Yes - the socket should be connected only when the system is not operating, with no pressure or very low pressure (a few bars) to avoid leaks or air ingress. Although both socket and plug have shut-off valves and flat sealing surfaces minimizing residual oil leakage (~0.1 ml on disconnection) and air inclusion (~0.02 ml on connection), depressurizing or reducing system pressure to a very low level before connection is required for proper, leak-free operation; also ensure valve surfaces are clean.

Socket with shut-off valve for quick-connect diagnostic connector with GW NPT, ISO 15171-1

Q: How should the Socket with shut-off valve for quick-connect diagnostic connector with GW NPT, ISO 15171-1 be cleaned to ensure leak-free operation?

To ensure leak-free operation, the Socket with shut-off valve for quick-connect diagnostic connector with GW NPT, ISO 15171-1 must be kept impeccably clean, especially the valve sealing and flat mating surfaces. Recommended cleaning procedure: 1. Depressurize: Always connect/disconnect and clean only when the system is static with no pressure or only very low pressure (a few bars). 2. External wipe: Remove gross contamination with a clean, lint-free cloth soaked in a compatible solvent (hydraulic oil-compatible cleaner or isopropyl alcohol). 3. Blow out: Use clean, dry, oil-free compressed air to remove residual particles and solvent from the socket bore and valve areas. Keep pressure low and hold the socket oriented so debris exits away from the valve. 4. Inspect: Visually inspect the flat sealing surfaces and valve faces for scratches, nicks, corrosion or debris. Any damage compromises sealing and must be repaired or replaced. 5. Final wipe: Lightly coat a new lint-free cloth with fresh hydraulic oil (compatible with system fluid and NBR seals) and wipe the sealing surfaces to leave a thin protective filmâdo not over-lubricate. 6. Protect until use: Fit protective caps/plugs when the socket is not in service to prevent contamination. 7. Routine interval: Clean whenever contamination is suspected, before connecting pressure gauges, and as part of regular maintenance schedules in dirty environments. Do not use aggressive solvents that attack NBR seals or leave residues. Follow these steps to maintain the Socket with shut-off valve for quick-connect diagnostic connector with GW NPT, ISO 15171-1 performance and prevent leaks or air inclusion.

All products, Quick-connect measurement fittings/

Additional information

Material	CS – steel (cast iron)

Socket 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 permanently installed in the hydraulic system, and the quick coupling sockets are 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 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-1PDF1	Measurement quick-connect socket PD with GW 1/8" NPT	-	400	In stock	0 zł		Enquiry
PC-1PDF2	Measurement quick-connect socket PD with GW 1/4" NPT	-	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

Socket 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 permanently installed in the hydraulic system, and the quick coupling sockets are 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 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.