Product Introduction:
It is an important component of the instrument measurement pipeline system, mainly consisting of globe valves and ball valves, which are used to open or cut off pipeline pathways. Good sealing performance and long service life. Even if the sealing surface is damaged, only vulnerable parts need to be replaced to continue use. During installation, the flow direction of the medium should be consistent with the direction of the arrow on the valve body.
The handle of the needle valve is made of straight stainless steel material, which is not easily damaged. It can be used as a cutoff or to regulate the flow rate of the medium. The switch is lightweight and has good anti-corrosion performance.
Nominal pressure: PN2.5 PN4 PN6.4 PN16 PN32 PN60Mpa
Nominal diameter: DN5 to DN25
Applicable media: various non corrosive or corrosive media such as supercritical steam, oil, water, gas, etc
Applicable temperature: -20 ℃~+440 ℃~70 ℃~240 ℃ ≤ 540 ℃ ≤ 570 ℃, etc
Manufacturing materials: 12Cr1MoG, 1Cr18Ni9Ti, 304, 316, 316L, F22 F91 F92 F316H, etc
Needle valve selection:
- Low temperature needle valves with valve covers should be selected for pipeline systems and devices for low-temperature media.
- On the pipeline system of the catalytic cracking unit in the refining unit, a lifting rod needle valve can be selected.
- In the equipment and pipeline systems of corrosive media such as acid and alkali in chemical systems, it is advisable to use all stainless steel needle valves made of austenitic stainless steel with polytetrafluoroethylene as the valve seat sealing ring.
- Metal to metal sealed needle valves can be used on pipeline systems or devices for high-temperature media in metallurgical systems, power systems, petrochemical plants, and urban heating systems.
- When flow regulation is required, a worm gear transmission, pneumatic or electric regulating needle valve with a V-shaped opening can be selected.
- For the main pipelines of oil and natural gas transportation, those that need to be cleaned and buried underground, needle valves with full bore and fully welded structures should be selected; For ball valves buried on the ground, choose full bore welded connections or flange connections.
- Flange connected needle valves are used for the transportation pipelines and storage equipment of finished oil products.
- On the pipelines of urban gas and natural gas, needle valves with flange connections and internal thread connections are selected.
- In the oxygen pipeline system of the metallurgical system, it is advisable to use needle valves that have undergone strict degreasing treatment and are connected by flanges.