Can the Needle control valve with GZ BSP, EWO be used with corrosive or flammable gases, or only with non-flammable, non-toxic gases like nitrogen and CO2?

Needle control valve with GZ BSP, EWO is specified for air installations and for non-flammable, non-toxic gases (nitrogen, carbon dioxide, helium, argon, etc.). Its body and needle are brass, stem sealing is NBR, working temperature â10Â°C to +90Â°C and working pressure up to 25â40 bar depending on DN. Because of the brass construction and NBR sealing, and given the manufacturerâs statement, it is intended for non-flammable, non-toxic gases only. It is not rated for corrosive gases (which can attack brass or NBR) nor for flammable/toxic gases unless the manufacturer explicitly certifies such service and appropriate materials/seals are used. For corrosive or flammable gases, consult the manufacturer for suitable materials (e.g., stainless steel, compatible elastomers) and required safety/certification before use.

Is the Needle control valve with GZ BSP, EWO suitable for high-pressure applications up to 40 bar across all DN sizes?

Needle control valve with GZ BSP, EWO: It depends on DN. The specification states working pressure ranges from 25 to 40 bar depending on internal diameter (DN), so not all DN sizes are rated to 40 bar. Check the productâs DN-specific data to confirm which sizes are certified for 40 bar; others will have lower maximum working pressures.

Can the Needle control valve with GZ BSP, EWO be used in temperatures below -10Â°C or above +90Â°C?

Needle control valve with GZ BSP, EWO cannot be reliably used below â10 Â°C or above +90 Â°C. The specified operating temperature range is â10 Â°C to +90 Â°C; outside this range the NBR stem sealing and possibly other components (brass behavior under extreme conditions, sealing integrity) may fail, compromising performance and safety. Use within the stated range only or consult manufacturer for special materials/variants rated for lower or higher temperatures.

Needle control valve with GZ BSP, EWO

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Additional information

Material	B – brass (bronze)

The needle control valve with BSP external thread is used to regulate the flow of the medium in the installation by changing the cross-section of the flow opening, up to its complete closure. They are intended for air installations, and can also be used with non-flammable and non-toxic gases (nitrogen, carbon dioxide, helium, argon, etc.). Needle valves have a brass cone (needle), whose displacement allows for smooth regulation from the fully open position to closed. The direction of flow is indicated by an arrow on the valve body. Maximum constant working pressure across the full temperature range. Body material: brass. Needle material: brass. Stem sealing: NBR. Working pressure: from 25 bar to 40 bar, depending on the internal diameter DN. Operating temperature: from -10°C to +90°C.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
EW-55812	Needle valve DN 4 with GZ 1/4" BSP	4	25	In stock	Enquiry
EW-55814	Needle valve DN 4 with GZ 3/8" BSP	4	25	In stock	Enquiry
EW-55816	Needle valve DN 11 with GZ 1/2" BSP	10	40	In stock	Enquiry

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The needle control valve with BSP external thread is used to regulate the flow of the medium in the installation by changing the cross-section of the flow opening, up to its complete closure. They are intended for air installations, and can also be used with non-flammable and non-toxic gases (nitrogen, carbon dioxide, helium, argon, etc.). Needle valves have a brass cone (needle), whose displacement allows for smooth regulation from the fully open position to closed. The direction of flow is indicated by an arrow on the valve body. Maximum constant working pressure across the full temperature range. Body material: brass. Needle material: brass. Stem sealing: NBR. Working pressure: from 25 bar to 40 bar, depending on the internal diameter DN. Operating temperature: from -10°C to +90°C.