Is the Stainless Steel Needle Valve H-99 with NPT GW Connection suitable for media at temperatures up to 648°C when fitted with GRAFOIL packing?

Yes. The Stainless Steel Needle Valve H-99 with NPT GW Connection fitted with GRAFOIL packing is suitable for media at temperatures up to 648°C. The valve is manufactured entirely from corrosion-resistant AISI 316 stainless steel, uses a metal-to-metal sealing system for reliability, and the specified GRAFOIL packing provides temperature resistance up to +648°C, while the valve is rated for pressures up to 690 bar and factory-tested for safety and integrity.

Can the Stainless Steel Needle Valve H-99 with NPT GW Connection tolerate pressures up to 690 bar when used with PTFE or GRAFOIL packing?

Yes. The Stainless Steel Needle Valve H-99 with NPT GW Connection can tolerate pressures up to 690 bar when used with either PTFE or GRAFOIL packing. The product description specifies pressure handling up to 690 bar and notes that the valve is manufactured from corrosion-resistant AISI 316 stainless steel with a metal-to-metal sealing system and choice of PTFE (temperature limit up to +204°C) or GRAFOIL (temperature limit up to +648°C) packing. Each unit is factory tested to ensure safety and integrity, and the valve is supplied with NPT female connections for straightforward installation.

Valve needle with a female NPT thread steel stainless, type H-99

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Additional information

Material	SS – stainless steel

High-pressure valve needle intended for mounting in installation or mounting panel. used mainly in heavy conditions, for sampling samples, cutting flow and for stations for testing. standard with stem type V (work valve close – open). each valve is factory tested. Coupling material: steel AISI 316. Material stem: steel AISI 316. sealing valve: metal/metal (steel AISI 316). sealing gland: PTFE or GRAFOIL. Operating temperature: up to +204°C (PTFE), up to +648°C (GRAFOIL). Working pressure: up to 690 bar. Connection: NPT female.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
HM-H99-SS-FNV-02	Valve needle H99, 2 x 1/8" NPT female, seal PTFE, SS	5	690	In stock	Enquiry
HM-H99-SS-FNV-02-G	Valve needle H99, 2 x 1/8" NPT female, seal Grafoil, SS	5	690	In stock	Enquiry
HM-H99-SS-FNV-04	Valve needle H99, 2 x 1/4" NPT female, seal PTFE, SS	5	690	In stock	Enquiry
HM-H99-SS-FNV-06	Valve needle H99, 2 x 3/8" NPT female, seal PTFE, SS	5	690	In stock	Enquiry
HM-H99-SS-FNV-08	Valve needle H99, 2 x 1/2" NPT female, seal PTFE, SS	5	690	In stock	Enquiry
HM-H99-SS-FNV-08-G	Valve needle H99, 2 x 1/2" NPT female, seal Grafoil, SS	5	690	In stock	Enquiry
HM-H99-SS-FNV-12	Valve needle H99, 2 x 3/4" NPT female, seal PTFE, SS	6	690	In stock	Enquiry
HM-H99-SS-FNV-16	Valve needle H99, 2 x 1" NPT female, seal PTFE, SS	8	690	In stock	Enquiry

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High-pressure valve needle intended for mounting in installation or mounting panel. used mainly in heavy conditions, for sampling samples, cutting flow and for stations for testing. standard with stem type V (work valve close – open). each valve is factory tested. Coupling material: steel AISI 316. Material stem: steel AISI 316. sealing valve: metal/metal (steel AISI 316). sealing gland: PTFE or GRAFOIL. Operating temperature: up to +204°C (PTFE), up to +648°C (GRAFOIL). Working pressure: up to 690 bar. Connection: NPT female.