Can the Needle valve with safety insert, stainless steel, H-285 be field-serviced without removing the valve from the HSSC sampling cylinder?

Yes. The Needle valve with safety insert, stainless steel, H-285 can be field-serviced without removing the valve from the HSSC sampling cylinder. The safety insert is designed to be easily replaced in the field . it screws into the valve and can be removed and fitted while the valve remains installed. The safety plate welded to the insert is the sacrificial element that ruptures at a specified pressure and the insertâs replacement restores the safety function. Note: follow appropriate safety procedures, ensure the cylinder is depressurized and comply with applicable standards and TPED/ISO guidance when performing service.

How does the safety insert in the Needle valve with safety insert, stainless steel, H-285 protect the HSSC sampling cylinder from overpressure?

The Needle valve with safety insert, stainless steel, H-285 protects the HSSC sampling cylinder from overpressure by using a threaded safety insert with a welded safety plate designed to rupture at a predetermined pressure. If cylinder pressure exceeds the insertâs burst rating (available as 131 bar or 196 bar), the safety plate fails and the medium is vented through holes in the hexagonal head of the insert, preventing further pressure rise inside the cylinder. The insert is replaceable in the field without removing the valve from the cylinder. The valve assembly is pressure-tested per ISO 14246 (valve at 80% of insert burst pressure; full valve tested to 120% of working pressure) and complies with TPED (2010/35/EU). Materials and seals (AISI 316, alloy 600 plate, PEEK stem tip, Viton/NBR/PTFE seals) ensure reliable performance up to specified temperature and pressure limits.

What burst pressure options are available for the Needle valve with safety insert, stainless steel, H-285?

Needle valve with safety insert, stainless steel, H-285. available burst pressure options for the safety insert are 131 bar or 196 bar.

Needle valve with safety insert, stainless steel, H-285

All products, Precision threaded fasteners/

Additional information

Material	SS – stainless steel

Needle valve with a non-rotating stem tip (PEEK), designed for installation from the external thread side in HSSC sampling cylinders. The safety insert screwed into the valve protects the cylinder from excessive pressure increase. The safety plate welded to the insert ruptures at a specified pressure, allowing the medium to flow through holes in the hexagonal head of the insert. The safety insert can be easily replaced in the field without the need to disassemble the valve from the cylinder. The valve is tested at 120% of the working pressure according to ISO 14246 (valve with safety insert at 80% of the insert’s burst pressure). The valve meets the requirements of the TPED directive (2010/35/EU). Material: AISI 316 steel (knob – aluminum). Safety plate material: alloy 600/B168. Stem sealing: NBR o-ring, PTFE ring. Insert sealing: o-ring (viton). Stem tip: PEEK. Working pressure: up to 206 bar (at 37°), temperature dependent. Insert burst pressure: 131 bar or 196 bar. Flow coefficient: 0.53 Cv. Operating temperature: from -20°C to +122°C.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Price	Quantity	Actions	Catalogue
HM-H285-SS-NP-04-1900	Needle valve with safety plate H-285, 1900 psi, GZ/GW 1/4" NPT, seal PEEK	6	206	In stock	0 zł		Enquiry
HM-H285-SS-NP-04-2850	Needle valve with safety plate H-285, 2850 psi, GZ/GW 1/4" NPT, seal PEEK	6	206	In stock	0 zł		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

Needle valve with a non-rotating stem tip (PEEK), designed for installation from the external thread side in HSSC sampling cylinders. The safety insert screwed into the valve protects the cylinder from excessive pressure increase. The safety plate welded to the insert ruptures at a specified pressure, allowing the medium to flow through holes in the hexagonal head of the insert. The safety insert can be easily replaced in the field without the need to disassemble the valve from the cylinder. The valve is tested at 120% of the working pressure according to ISO 14246 (valve with safety insert at 80% of the insert’s burst pressure). The valve meets the requirements of the TPED directive (2010/35/EU). Material: AISI 316 steel (knob – aluminum). Safety plate material: alloy 600/B168. Stem sealing: NBR o-ring, PTFE ring. Insert sealing: o-ring (viton). Stem tip: PEEK. Working pressure: up to 206 bar (at 37°), temperature dependent. Insert burst pressure: 131 bar or 196 bar. Flow coefficient: 0.53 Cv. Operating temperature: from -20°C to +122°C.