Can the METRIC (DIN 2353) zinc-nickel plated carbon steel twist-on connector, HOLMBURY type RH, be disconnected under the allowed residual pressure of 50 bar without leakage?

Yes. The METRIC (DIN 2353) zinc-nickel plated carbon steel twist-on connector, HOLMBURY type RH Format is designed for disconnection under a residual pressure of 50 bar without leakage. Its plug is a screw quick coupling with zero leakage and a flat front surface that prevents fluid loss during disconnection. The product specification explicitly states couplings are allowed to be disconnected under a residual pressure of 50 bar for hydraulic oil service, with operating temperature -25Â°C to +100Â°C and working pressures up to 420 bar (size dependent). Ensure the coupling is in good condition, correctly installed, and used within specified limits (safety factor 4:1, rated pressures), and follow manufacturer procedures when disconnecting.

Is the METRIC (DIN 2353) zinc-nickel plated carbon steel twist-on connector, HOLMBURY type RH safe to disconnect under 50 bar residual pressure?

Yes. The METRIC (DIN 2353) zinc-nickel plated carbon steel twist-on connector, HOLMBURY type RH is designed and rated to be disconnected under a residual pressure of 50 bar. The product description explicitly states the coupling is allowed under residual pressure of 50 bar, features a flat front surface to prevent fluid loss during disconnection, and is specified for hydraulic oil service with operating temperature â25Â°C to +100Â°C and working pressures up to 420 bar (size-dependent). Ensure the specific size and installation meet manufacturer instructions and that system conditions (temperature, fluid compatibility, wear/corrosion) are appropriate before performing disconnection.

Can METRIC (DIN 2353) zinc-nickel plated carbon steel twist-on connector, HOLMBURY type RH, be used for hydraulic oil up to 420 bar?

Yes. METRIC (DIN 2353) zinc-nickel plated carbon steel twist-on connector, HOLMBURY type RH can be used for hydraulic oil up to 420 bar, with these conditions and limitations: - The product specification states âApplication: hydraulic power (hydraulic oil)â and âWorking pressure: up to 420 bar (depending on the size of the coupling)â, so use at pressures up to 420 bar is within the declared capability for the correct size variant. - Coupling permits residual pressure on disconnection up to 50 bar; do not attempt disconnection if residual system pressure exceeds 50 bar. - Operating temperature range is -25Â°C to +100Â°C; ensure system fluid and environment fall inside this range. - Safety factor is 4:1; verify system design and peak loads comply with this margin. - Material is carbon steel with zinc-nickel coating; confirm compatibility of coating and base material with your hydraulic oil and any environmental/corrosion requirements. - Flow rating is provided for a 3 bar pressure drop; confirm flow/pressure-drop performance meets your application needs. - Ensure you select the correct coupling size variant rated for 420 bar and follow manufacturer installation, maintenance and compatibility instructions. If any of these conditions (size rating, residual-pressure practice, temperature, material compatibility, or safety margin) are not met in your system, do not use the coupling at 420 bar without further validation or an alternative rated component.

A screw-together quick coupling plug with male thread metric (DIN 2353) of zinc-nickel coated carbon steel, HOLMBURY type RH

All products, Hydraulic quick couplings/

Additional information

Material	CS – steel (cast iron)

A zero-leak screw-together quick coupling – plug, type RH, with a metric male thread DIN 2353. The flat face design prevents fluid loss during disconnection. The quick coupling may be connected under residual pressure of 50 bar. Application: power hydraulics (hydraulic oil). Material: zinc-nickel coated carbon steel. Operating temperature: from -25°C to +100°C. Working pressure: up to 420 bar (depending on the quick-coupling size). Safety factor 4:1. 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-RH08-M-12L	Plug screw-together RH 3/8", M18x1.5 male (12L)	-	420	In stock	Enquiry
HQ-RH12-M-15L	Plug screw-together RH 1/2", M22x1.5 male (15L)	-	420	In stock	Enquiry
HQ-RH12-M-16S	Plug screw-together RH 1/2", M24x1.5 male (16S)	-	420	In stock	Enquiry
HQ-RH20-M-30S	Plug screw-together RH 3/4", M42x2 male (30S)	-	350	In stock	Enquiry

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A zero-leak screw-together quick coupling – plug, type RH, with a metric male thread DIN 2353. The flat face design prevents fluid loss during disconnection. The quick coupling may be connected under residual pressure of 50 bar. Application: power hydraulics (hydraulic oil). Material: zinc-nickel coated carbon steel. Operating temperature: from -25°C to +100°C. Working pressure: up to 420 bar (depending on the quick-coupling size). Safety factor 4:1. The flow is given for a pressure drop of 3 bar.