Is the CEJN 525 hydraulic quick coupling, BSP GW plug with valve, galvanized steel compatible with hydraulic oil at 450 bar and Viton seals?

Yes. The CEJN 525 hydraulic quick coupling, BSP GW plug with valve, galvanized steel is compatible with hydraulic oil at 450 bar when specified with Viton seals. The series 525 is designed for hydraulic power and lists hydraulic oil among applications, has a working pressure up to 450 bar (depending on diameter), and offers Viton sealing with an operating range to +200Â°C. Material (steel with zincânickel coating) and a 4:1 safety factor suit heavyâduty hydraulic use. Ensure you select the correct diameter/version rated for 450 bar and that all system components and installation meet pressure and temperature requirements.

Can CEJN 525 hydraulic quick coupling, BSP GW plug with valve, galvanized steel be used with steam at 200Â°C and Viton seals?

Yes - CEJN 525 hydraulic quick coupling, BSP GW plug with valve, galvanized steel can be used with steam at 200Â°C only if fitted with Viton seals. The product data lists Viton sealing with an operating temperature up to +200Â°C and explicitly includes steam among intended applications. Ensure the specific coupling size and construction are rated for your working pressure and steam conditions (pressure, thermal cycling, condensate, cavitation); the nominal working pressure is up to 450 bar (depending on diameter) with a 4:1 safety factor. For final use, confirm the exact part variant, verify compatible pressure/temperature combinations with CEJN, and follow applicable steam-system safety practices.

Can CEJN 525 hydraulic quick coupling, BSP GW plug with valve, galvanized steel be used with ammonia and Viton seals?

Generally no. CEJN 525 hydraulic quick coupling, BSP GW plug with valve, galvanized steel with Viton seals is not recommended for use with ammonia. Why: Ammonia (anhydrous NH3) is a corrosive, alkaline, and small molecule that can permeate and degrade many elastomers. While Viton (fluoroelastomer) offers excellent resistance to hydrocarbons, oils, and many chemicals and has a wide temperature range (-15 Â°C to +200 Â°C per your data), it has limited compatible data with ammonia. Standard Viton compounds are typically not rated for prolonged exposure to ammonia (gaseous or liquefied) because ammonia can cause swelling, hardening or loss of mechanical properties in many fluoroelastomers. CEJNâs product description lists compatibility for hydraulic oil, water, steam, fuels, gases and chemicals in general, but does not explicitly state ammonia compatibility. Metals: The zincânickel coated steel body resists corrosion in many environments, but ammoniaâespecially in presence of moistureâcan induce stress corrosion or attack coatings/fasteners over time. That risk depends on concentration, temperature and exposure duration. Recommendation: Do not use this coupling with ammonia without confirmation from CEJN or the seal compound manufacturer that the specific Viton grade used is ammoniaâresistant. If ammonia service is required, consult CEJN for an approved material/seal option (e.g., specialized elastomers such as certain EPDM grades or PTFE/metal sealing solutions) and verify compatibility for pressure, temperature and safety requirements.

CEJN 525 hydraulic quick coupling, BSP GW plug with valve, galvanized steel

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Additional information

Material	CS – steel (cast iron)

CEJN series 525 quick coupling plug (NORDIC RANGE) with shut-off valve and internal BSP thread. It is designed for heavy-duty working conditions. Application: hydraulic power (hydraulic oil), industrial (water, steam, fuels and oils, gases and chemicals). Material: steel coated with zinc-nickel. Working pressure: up to 450 bar (depending on diameter). Safety factor 4:1. Sealing: viton or NBR. Operating temperature: from -30°C to +100°C (for NBR), from -15°C to +200°C (for viton). Flow rate is given for a pressure drop of 3 bar.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
CJ-H-105256202	CEJN 525 plug, 1/4" BSP thread, NBR seal, with valve	-	450	In stock	Enquiry
CJ-H-105256204	CEJN 525 plug, 3/8" BSP thread, NBR seal, with valve	-	350	In stock	Enquiry
CJ-H-105256205	CEJN 525 plug, 1/2" BSP thread, NBR seal, with valve	-	300	In stock	Enquiry
CJ-H-105256207	CEJN 525 plug, 3/4" BSP thread, NBR seal, with valve	-	280	In stock	Enquiry
CJ-H-105256209	CEJN 525 plug, 1" BSP thread, NBR seal, with valve	-	250	In stock	Enquiry
CJ-H-105256212	CEJN 525 plug, 1/4" BSP thread, viton seal, with valve	-	450	In stock	Enquiry
CJ-H-105256214	CEJN 525 plug, 3/8" BSP thread, viton seal, with valve	-	350	In stock	Enquiry
CJ-H-105256215	CEJN 525 plug, 1/2" BSP thread, viton seal, with valve	-	300	In stock	Enquiry
CJ-H-105256217	CEJN 525 plug, 3/4" BSP thread, viton seal, with valve	-	280	In stock	Enquiry
CJ-H-105256219	CEJN 525 plug, 1" BSP thread, viton seal, with valve	-	250	In stock	Enquiry

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CEJN series 525 quick coupling plug (NORDIC RANGE) with shut-off valve and internal BSP thread. It is designed for heavy-duty working conditions. Application: hydraulic power (hydraulic oil), industrial (water, steam, fuels and oils, gases and chemicals). Material: steel coated with zinc-nickel. Working pressure: up to 450 bar (depending on diameter). Safety factor 4:1. Sealing: viton or NBR. Operating temperature: from -30°C to +100°C (for NBR), from -15°C to +200°C (for viton). Flow rate is given for a pressure drop of 3 bar.