Can Flat (butt) thread seal, type GD reliably seal a GZ/GW BSP connection at 25 bar with EPDM, PTFE, Viton, PU or NovapressÂ® at their max temperature limits?

Flat (butt) thread seal, type GD Format can reliably seal a GZ/GW BSP connection at 25 bar when used and installed as intended, provided the gasket material remains within its stated maximum operating temperature and is compatible with the fluid. Summary by material at their stated maximum temperatures (mechanical sealing capability only; chemical compatibility must be verified separately): - EPDM (max +180Â°C): Suitable for 25 bar if temperature â¤ +180Â°C and installation prevents eccentricity. Good for many water/steam applications, poor for oils/hydrocarbons. - NovapressÂ® (max +250Â°C): Suitable for 25 bar if temperature â¤ +250Â°C and properly seated. Check specific NovapressÂ® version and chemical compatibility. - PTFE (max +250Â°C): Suitable for 25 bar if temperature â¤ +250Â°C; excellent chemical resistance but low elastic recovery.ensure correct compression and surface finish. - PU (Polyurethane, max +110Â°C): Suitable for 25 bar if temperature â¤ +110Â°C; limited highâtemperature performance and some chemical limitations (hydrocarbons, strong oxidizers). - Viton (max +200Â°C): Suitable for 25 bar if temperature â¤ +200Â°C and chemically compatible with the medium. Important caveats: sealing reliability depends on correct installation (gasket seated in internal thread socket, avoiding eccentricity), surface condition, thread fit, compressive load, and fluid chemical aggressiveness at temperature. Always verify material chemical compatibility with the specific medium and consult manufacturer data for dynamic or safetyâcritical applications.

Can Flat (butt) thread seal, type GD maintain a 25 bar seal in a GZ/GW BSP joint across EPDM, PTFE, Viton, PU or NovapressÂ® max temperature limits?

Flat (butt) thread seal, type GD Format can maintain a 25 bar seal in a GZ/GW BSP joint across the listed materials only within their stated maximum operating temperature limits. All listed gasket materials (EPDM: -50Â°C to +180Â°C; NovapressÂ®: -25Â°C to +250Â°C; PTFE: -40Â°C to +250Â°C; PU: -40Â°C to +110Â°C; Viton: -20Â°C to +200Â°C) are compatible with the GD design for sealing GZ/GW BSP when installed correctly in the internal thread socket to prevent eccentricity and ensure flat contact. The 25 bar rating applies provided the gasket material is used below its maximum temperature limit and chemical compatibility with the conveyed medium is confirmed; exceeding temperature limits or incompatible media can compromise the seal.

Will Flat (butt) thread seal, type GD hold 25 bar in a GZ/GW BSP joint at each materialâs maximum temperature?

Flat (butt) thread seal, type GD Format: Noâwhether the GD flat thread gasket will hold 25 bar at each materialâs listed maximum temperature depends on the gasket materialâs mechanical and sealing properties at that temperature and on the medium; maximum temperature ratings given are thermal limits, not guaranteed pressure-capacity ratings. Typical considerations: - EPDM (max â +180Â°C): EPDMâs mechanical strength and elastomeric recovery degrade near its upper limit; at or near +180Â°C it will likely lose sealing force and may not reliably hold 25 bar. Not recommended to assume 25 bar at maximum temperature. - NovapressÂ® (max â +250Â°C): If this is a high-temperature engineered polymer/metallized variant, it may retain sealing capacity better, but confirm specific pressure-vs-temperature certification from manufacturer. Do not assume 25 bar without data. - PTFE (max â +250Â°C): PTFE remains chemically stable at high temperatures but is soft/creeps under load (cold flow). At high temperature and 25 bar it may creep and leak unless design accounts for flange compression and creep relaxation. Manufacturer confirmation required. - Polyurethane PU (max â +110Â°C): Approaching +110Â°C PU will soften and lose load-bearing/sealing ability; unlikely to reliably hold 25 bar at its max temp. - Viton (max â +200Â°C): Viton holds properties better at high temperature than many elastomers but near +200Â°C aging and loss of elasticity reduce sealing reliability under 25 bar. Verify with supplier. Conclusion: Do not assume flat GD gaskets will hold 25 bar at their material maximum temperatures. Verify with gasket manufacturer/test certificates for pressure capability vs temperature and for compatibility with the medium; if unavailable, limit operating temperature below the materialâs upper range or choose a material/design rated for 25 bar at the required operating temperature.

Flat (butt) thread seal, type GD

All products, Threaded couplings and adapters/

Additional information

Maximum operating temperature [°C]	110
Minimum operating temperature [°C]	-40

Flat gasket (face) GD designed for sealing the connection of external cylindrical thread (e.g., GZ BSP) with internal thread (e.g., GW BSP). The gasket should be placed in the internal thread socket in a way that prevents its eccentric positioning and should adhere to the flat surfaces of the internal thread socket and the external threaded fitting. Working pressure: 25 bar. Gasket material: EPDM – approximate temperature range: from -50°C to +180°C; Novapress® – approximate temperature range: from -25°C to +250°C; PTFE – approximate temperature range: from -40°C to +250°C; polyurethane (PU) – approximate temperature range: from -40°C to +110°C; viton – approximate temperature range: from -20°C to +200°C. Maximum operating temperature range, without considering the influence of the medium (chemical resistance to the substance flowing through the connection at a specified temperature).

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
GD-013-EP	End seal GD for 1/2" BSP thread (20x13x2), EPDM	-	-	In stock	Enquiry
GD-013-NP	End seal GD for 1/2" BSP thread (20x13x2), novapress	-	-	In stock	Enquiry
GD-013-PTFE	End seal GD for 1/2" BSP thread (20x13x2), PTFE	-	-	In stock	Enquiry
GD-013-PU	End seal GD for 1/2" BSP thread (20x13x2), polyurethane	-	-	In stock	Enquiry
GD-013-VI	End seal GD for 1/2" BSP thread (20x13x2), Viton	-	-	In stock	Enquiry
GD-020-EP	End seal GD for 3/4" BSP thread (26x19x2), EPDM	-	-	In stock	Enquiry
GD-020-NP	End seal GD for 3/4" BSP thread (26x19x2), novapress	-	-	In stock	Enquiry
GD-020-PTFE	End seal GD for 3/4" BSP thread (26x19x2), PTFE	-	-	In stock	Enquiry
GD-020-PU	End seal GD for 3/4" BSP thread (26x19x2), polyurethane	-	-	In stock	Enquiry
GD-020-VI	End seal GD for 3/4" BSP thread (26x19x2), Viton	-	-	In stock	Enquiry
GD-025-EP	End seal GD for 1" BSP thread (33x24x2), EPDM	-	-	In stock	Enquiry
GD-025-NP	End seal GD for 1" BSP thread (33x24x2), novapress	-	-	In stock	Enquiry
GD-025-PTFE	End seal GD for 1" BSP thread (33x24x2), PTFE	-	-	In stock	Enquiry
GD-025-PU	End seal GD for 1" BSP thread (33x24x2), polyurethane	-	-	In stock	Enquiry
GD-025-VI	End seal GD for 1" BSP thread (33x24x2), Viton	-	-	In stock	Enquiry
GD-032-EP	End seal GD for 1.1/4" BSP thread (42x33x2), EPDM	-	-	In stock	Enquiry
GD-032-NP	End seal GD for 1.1/4" BSP thread (42x33x2), novapress	-	-	In stock	Enquiry
GD-032-PTFE	End seal GD for 1.1/4" BSP thread (42x33x2), PTFE	-	-	In stock	Enquiry
GD-032-PU	End seal GD for 1.1/4" BSP thread (42x33x2), polyurethane	-	-	In stock	Enquiry
GD-032-VI	End seal GD for 1.1/4" BSP thread (42x33x2), Viton	-	-	In stock	Enquiry
GD-038-EP	End seal GD for 1.1/2" BSP thread (48x39x2), EPDM	-	-	In stock	Enquiry
GD-038-NP	End seal GD for 1.1/2" BSP thread (48x39x2), novapress	-	-	In stock	Enquiry
GD-038-PTFE	End seal GD for 1.1/2" BSP thread (48x39x2), PTFE	-	-	In stock	Enquiry
GD-038-PU	End seal GD for 1.1/2" BSP thread (48x39x2), polyurethane	-	-	In stock	Enquiry
GD-038-VI	End seal GD for 1.1/2" BSP thread (48x39x2), Viton	-	-	In stock	Enquiry
GD-050-EP	End seal GD for 2" BSP thread (60x49x2), EPDM	-	-	In stock	Enquiry
GD-050-NP	End seal GD for 2" BSP thread (60x49x2), novapress	-	-	In stock	Enquiry
GD-050-PTFE	End seal GD for 2" BSP thread (60x49x2), PTFE	-	-	In stock	Enquiry
GD-050-PU	End seal GD for 2" BSP thread (60x49x2), polyurethane	-	-	In stock	Enquiry
GD-050-VI	End seal GD for 2" BSP thread (60x49x2), Viton	-	-	In stock	Enquiry
GD-065-EP	End seal GD for thread 2.1/2" BSP (76x63x2.5), EPDM	-	-	In stock	Enquiry
GD-065-NP	End seal GD for 2.1/2" BSP thread (76x63x2.5), novapress	-	-	In stock	Enquiry
GD-065-PTFE	End seal GD for thread 2.1/2" BSP (76x63x2.5), PTFE	-	-	In stock	Enquiry
GD-065-PU	End seal GD for thread 2.1/2" BSP (76x63x2.5), polyurethane	-	-	In stock	Enquiry
GD-065-VI	End seal GD for thread 2.1/2" BSP (76x63x2.5), Viton	-	-	In stock	Enquiry
GD-080-EP	End seal GD for 3" BSP thread (88x78x3), EPDM	-	-	In stock	Enquiry
GD-080-NP	End seal GD for 3" BSP thread (88x77x3), novapress	-	-	In stock	Enquiry
GD-080-PTFE	End seal GD for 3" BSP thread (88x77x3), PTFE	-	-	In stock	Enquiry
GD-080-PU	End seal GD for 3" BSP thread (88x77x3), polyurethane	-	-	In stock	Enquiry
GD-080-VI	End seal GD for 3" BSP thread (88x77x3), Viton	-	-	In stock	Enquiry
GD-100-EP	End seal GD for 4" BSP thread (114x100x3), EPDM	-	-	In stock	Enquiry
GD-100-NP	End seal GD for 4" BSP thread (114x100x3), novapress	-	-	In stock	Enquiry
GD-100-PTFE	End seal GD for 4" BSP thread (114x100x3), PTFE	-	-	In stock	Enquiry
GD-100-PU	End seal GD for 4" BSP thread (114x100x3), polyurethane	-	-	In stock	Enquiry
GD-100-VI	End seal GD for 4" BSP thread (114x100x3), Viton	-	-	In stock	Enquiry

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Flat gasket (face) GD designed for sealing the connection of external cylindrical thread (e.g., GZ BSP) with internal thread (e.g., GW BSP). The gasket should be placed in the internal thread socket in a way that prevents its eccentric positioning and should adhere to the flat surfaces of the internal thread socket and the external threaded fitting. Working pressure: 25 bar. Gasket material: EPDM – approximate temperature range: from -50°C to +180°C; Novapress® – approximate temperature range: from -25°C to +250°C; PTFE – approximate temperature range: from -40°C to +250°C; polyurethane (PU) – approximate temperature range: from -40°C to +110°C; viton – approximate temperature range: from -20°C to +200°C. Maximum operating temperature range, without considering the influence of the medium (chemical resistance to the substance flowing through the connection at a specified temperature).