Is the Needle valve with GW NPT stainless steel, type H-99 suitable for sampling at 690 bar and temperatures up to 648Â°C with GRAFOIL packing?

Yes. Needle valve with GW NPT stainless steel, type H-99 is suitable for sampling at pressures up to 690 bar and temperatures up to 648Â°C when equipped with GRAFOIL packing. The valveâs specified working pressure is up to 690 bar, connection is NPT female, body and stem are AISI 316 stainless steel, sealing is metal/metal (AISI 316) and packing options include GRAFOIL, which supports operation up to +648Â°C. Ensure correct installation, factory testing verification, and compatibility of all system components and media at those conditions.

Can the Needle valve with GW NPT stainless steel, type H-99 be panel-mounted for use in harsh outdoor sampling stations?

Yes. The Needle valve with GW NPT stainless steel, type H-99 is suitable for panel mounting and harsh outdoor sampling stations. It is designed for system or panel installation, built from AISI 316 stainless steel (body and stem), metal-to-metal sealing, and offers PTFE or GRAFOIL packing for service up to +204Â°C or +648Â°C respectively. It is factory tested, rated to 690 bar, and uses NPT female connections, making it appropriate for sampling, flow shut-off, and testing in demanding environments.

Does the Needle valve with GW NPT stainless steel, type H-99 support metal-to-metal sealing for high-pressure testing?

Yes. The Needle valve with GW NPT stainless steel, type H-99 supports metal-to-metal sealing for high-pressure testing. The product description specifies valve sealing as metal/metal (AISI 316 steel), stem material AISI 316, and a working pressure up to 690 bar, making it suitable for high-pressure applications where metal-to-metal sealing is required. Note that packing seal options (PTFE or GRAFOIL) and the V-type stem operation should be considered for compatibility with your specific testing conditions and temperature range.

Needle valve with GW NPT stainless steel, type H-99

All products, Precision needle valves/

Additional information

Material	SS – stainless steel

High-pressure needle valve designed for installation in a system or panel mounting. Mainly used in harsh conditions for sampling, flow shut-off, and testing stations. Standard with a V-type stem (valve operation close – open). Each valve is factory tested. Connection material: AISI 316 steel. Stem material: AISI 316 steel. Valve sealing: metal/metal (AISI 316 steel). Packing seal: 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	H99 needle valve, 2 x 1/8" NPT female thread, PTFE seal, SS	5	690	In stock	Enquiry
HM-H99-SS-FNV-02-G	H99 needle valve, 2 x 1/8" NPT female thread, Grafoil seal, SS	5	690	In stock	Enquiry
HM-H99-SS-FNV-04	H99 needle valve, 2 x 1/4" NPT female thread, PTFE seal, SS	5	690	In stock	Enquiry
HM-H99-SS-FNV-06	H99 needle valve, 2 x 3/8" NPT female thread, PTFE seal, SS	5	690	In stock	Enquiry
HM-H99-SS-FNV-08	H99 needle valve, 2 x 1/2" NPT female thread, PTFE seal, SS	5	690	In stock	Enquiry
HM-H99-SS-FNV-08-G	H99 needle valve, 2 x 1/2" NPT female thread, Grafoil seal, SS	5	690	In stock	Enquiry
HM-H99-SS-FNV-12	H99 needle valve, 2 x 3/4" NPT female thread, PTFE seal, SS	6	690	In stock	Enquiry
HM-H99-SS-FNV-16	H99 needle valve, 2 x 1" NPT female threads, PTFE seal, SS	8	690	In stock	Enquiry

Do you need a larger quantity of products or a bespoke quote?

Call us: +48 61 653 02 22 or email us: tubes@tubes-international.com

SEND ENQUIRY

High-pressure needle valve designed for installation in a system or panel mounting. Mainly used in harsh conditions for sampling, flow shut-off, and testing stations. Standard with a V-type stem (valve operation close – open). Each valve is factory tested. Connection material: AISI 316 steel. Stem material: AISI 316 steel. Valve sealing: metal/metal (AISI 316 steel). Packing seal: PTFE or GRAFOIL. Operating temperature: up to +204°C (PTFE), up to +648°C (GRAFOIL). Working pressure: up to 690 bar. Connection: NPT female.