Can the Screwed quick-connector, plug with GW NPT of brass, HOLMBURY type WSC be connected or disconnected under residual pressure up to 50 bar without tools?

Yes. The Screwed quick-connector, plug with GW NPT of brass, HOLMBURY type WSC can be connected and disconnected under residual (static) pressure up to 50 bar without tools. Its brass body and valve design minimize leakage and air inclusion, and the plug sleeve with butterfly handles allows very quick, tool-free operation. The product description explicitly permits screwing the quick coupling under residual pressure up to 50 bar.

Is the Screwed quick-connector, plug with GW NPT of brass, HOLMBURY type WSC suitable for use in temperatures down to -40Â°C?

Yes. The Screwed quick-connector, plug with GW NPT of brass, HOLMBURY type WSC is specified for operation from -40Â°C to +106Â°C and uses NBR seals rated for that range, so it is suitable for use in temperatures down to -40Â°C.

Does the Screwed quick-connector, plug with GW NPT of brass, HOLMBURY type WSC resist corrosion in coastal environments?

Screwed quick-connector, plug with GW NPT of brass, HOLMBURY type WSC offers good general resistance to corrosion and changing weather conditions thanks to its brass body, as stated in the product description. Brass performs well against atmospheric corrosion and typical outdoor exposures. However, coastal environments pose additional challenges due to high salt (chloride) content, which accelerates corrosionâparticularly for ferrous components. The plug sleeve on this model is made of galvanized steel, which provides some protection but is more vulnerable to accelerated corrosion in salty, marine atmospheres than stainless steel or specially coated alloys. NBR seals are generally resistant to oils and a broad temperature range but do not protect metal parts from salt-induced corrosion. Conclusion: The brass body gives the Screwed quick-connector, plug with GW NPT of brass, HOLMBURY type WSC better-than-average weather resistance, but the presence of galvanized steel parts means it may not provide long-term, maintenance-free performance in aggressive coastal/marine environments. For reliable long-term use on the coast, consider additional protective measures (regular rinsing with fresh water, corrosion inhibitors) or a version with stainless steel components or marine-grade coatings.

A screw-together quick coupling, plug with NPT female thread made of brass, HOLMBURY type WSC

All products, Hydraulic quick couplings/

Additional information

Material	B – brass (bronze)

The HQ WSC quick-coupling plug, screw-together, with a valve with an NPT female thread, for use in the hydraulic systems of vehicles. The brass body provides excellent resistance to changing weather conditions. The valve design ensures minimal medium leakage and air inclusion during connection and disconnection. The plug sleeve is fitted with butterfly grips and allows the quick coupling to be connected and disconnected very quickly and easily without the need for tools. The quick coupling may be connected under residual pressure up to 50 bar (static pressure remaining in the system after the drive is switched off). Material: brass (body), galvanized steel (plug sleeve). Sealing: NBR. Operating temperature: from -40°C to +106°C. Working pressure: up to 210 bar (depending on the size). The flow is given for a pressure drop of 3 bar.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
HQ-WSC19-M-12N	Plug WSC DN19 with 3/4" NPT female	-	210	In stock	Enquiry
HQ-WSC25-M-16N	Plug WSC DN25 with 1" NPT female	-	210	In stock	Enquiry
HQ-WSC32-M-20N	Plug WSC DN32 with 1.1/4" NPT female	-	190	In stock	Enquiry

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The HQ WSC quick-coupling plug, screw-together, with a valve with an NPT female thread, for use in the hydraulic systems of vehicles. The brass body provides excellent resistance to changing weather conditions. The valve design ensures minimal medium leakage and air inclusion during connection and disconnection. The plug sleeve is fitted with butterfly grips and allows the quick coupling to be connected and disconnected very quickly and easily without the need for tools. The quick coupling may be connected under residual pressure up to 50 bar (static pressure remaining in the system after the drive is switched off). Material: brass (body), galvanized steel (plug sleeve). Sealing: NBR. Operating temperature: from -40°C to +106°C. Working pressure: up to 210 bar (depending on the size). The flow is given for a pressure drop of 3 bar.