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Type External Thread Needle Valve-Valve-Sampling Valve

Basic Info

Model No.:  J21W

Product Description

Model NO.: J21W Connection Mode: External Thread Pressure: High Pressure Media: Oil Sampling Valve: with Sample Tube and Isolating Valve Function3: Vent (Air Release Valve) Trademark: U-ideal Origin: Tianjin, China Power: Manual Material: Stainless Steel Standard: Nonstandard Media Temperature: High Temperature Function2: Drain Valve Function4: Can Connect with Pressure gauge Specification: ANSI JIN GB HS Code: 84818040
Type External Thread Needle Valve
 Needle valve type that can tolerate more than other types of valvepressure, sealed performance is good, so generally used for small flow, high pressure gas or liquid medium sealing. Needle valve type andPressure gaugeIs used the most appropriate. General type needle valve type screw thread connection.Nominal pressure: PN2.5 PN4 PN6.4 PN16 PN32Mpa: nominal diameter DN5 ~ DN25 applicable medium: oil, water, gas, etccorrosionSex or corrosive medium applicable temperature: - 20 ºC ~ + 440 ºC -- 70 ºC ~ 70 ºC 540 ºC 570 ºC or less or less manufacturing materials such as: 20 #, 1 cr18ni9ti, 304, 304, 316 l, 12 cr1mov, etc
The materials of main parts

Part name
Stem, Bonnet Stem, Disc Packing
J21/3W-16P Cr-Ni stainless steel Cr-Ni Stainless steel PTEF,flexible graphite
J21/3W-160,J21/3W -40 High quality carbon steel Cr stainless steel

Main performance and specifications

Nominal Pressure(MPa) Test pressure PS(MPa) Working Pressure(MPa) Working temperature (ºC) applicable medium
Shell(MPa) Sealing(liquid) Sealing(gas)
J21/3W -16 1.6 2.4 1.76 0.6 1.6 P≤540ºC Petroleum gas Water,acid,Steam, Oil, etc.
J21/3W-40P 4.0 6.0 4.4 0.6 4.0
J21/3W-160 16.0 24.0 17.6 0.6 16.0 C≤425ºC
J21/3W -320P 32.0 48.0 35.2 0.6 32.0

Selection principle
1, low temperature medium pipeline system and device, appropriate chooses combined with low temperature type needle valve bonnet.
2, refining unit of catalytic cracking unit of piping system, can choose lifting lever type needle valve.
3, chemical system in acid and alkali corrosive medium, such as equipment and piping system, appropriate chooses of austenitic stainless steel and ptfe seat sealing type stainless steel needle valve.
4, metallurgy system, power system, petrochemical plant,Urban heating systemIn the pipeline system of high temperature medium or device, can choose metal to metal seal type needle valve.
5, the need for flow control, can choose the worm gear and worm drive, pneumatic or electric type with v-shaped opening adjust needle valve.6, oil, natural gas transportation director line, need cleaning the pipeline, and to be buried in the ground, with full size, full welded structure type needle valve;Buried in the ground, choose the full size welded Ball Valve connection or flange connection.
7, product oil pipeline and storage equipment, choose the type needle valve with flange connection.
8, city gas and natural gas pipelines, selection of flange connection and female connection type needle valve.
9, metallurgy system oxygen in the pipeline system, appropriate chooses strict degreasing process, flange connection type needle valve.

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Product Categories : Needle Valve > Other Needle Valve

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