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  • 2W Threaded 2-Way 2-Position (Normally Open) Solenoid Valve

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2W Threaded 2-Way 2-Position (Normally Open) Solenoid Valve

2W Threaded 2-Way 2-Position (Normally Open) Solenoid Valve

  • Model:2W-10NK/2W-15NK/2W-20NK/2W-25NK/2W-32NK/2W-40NK/2W-50NK
  • Specification:DN10-DN50
  • Temperature:-20~65 ℃
  • Medium:Water, Liquid, Gas, Light oil (≤20cst)
  • Pressure:0~10bar
  • Connection method:Threaded (G / NPT)
  • Driving method:Semi-direct lifting (Semi-direct acting)
  • Material:Brass, 316 Stainless Steel (SS316)
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2W Threaded 2-Way 2-Position (Normally Open) Solenoid ValveOverview

The 2W series (DN10-DN50) 2/2-way threaded solenoid valve is an industrial-grade automated fluid shut-off valve designed for general fluid processing pipelines. Configured as a normally closed (NC) valve, its operational sequence is "opens when energized, closes when de-energized." The paramount technical attribute of this series is its semi-direct acting (step-by-step direct-acting) structural design, which supports zero differential pressure (0 bar) lightweight startup. By linking the electromagnetic moving plunger directly to the main diaphragm assembly, this valve combines the zero-pressure functionality of direct-acting valves with the high-flow capability of pilot-operated valves. The valve body is constructed from premium brass or high-performance SS316 stainless steel, fitted with standard female pipe threads to accommodate space-restricted and high-rigidity manifold layouts. Powered by heavy-duty electromagnetic coils and precision self-balancing diaphragm components, it performs reliably across a nominal pressure spectrum of 0 to 10 bar and operating temperatures from -20°C to 65°C, delivering remote automated control and tight shut-off for universal fluids.

Product Image:2W Threaded 2-Way 2-Position (Normally Open) Solenoid Valve

2W Threaded 2-Way 2-Position (Normally Open) Solenoid ValveCharacteristic

Semi-Direct Acting Mechanism & Zero-Pressure Reliability: Utilizing a linked dual-layer diaphragm layout, it operates effortlessly at zero pressure drop (0 bar) or under gravity-fed conditions without requiring medium pressure assistance, flawlessly eliminating operational failures in low-pressure pipelines.

0 to 10 bar Universal Pressure Spectrum & High Flow Rates: Fluid-dynamics optimized valve cavity and large flow paths significantly enhance the flow coefficient (Kv value), providing extremely low flow resistance and stable isolation under low-to-medium pressure general.

Broad Media Compatibility: Internal sealing Boundaries and diaphragm elastomers are structurally enhanced to perfectly handle frequent control of water, general liquids, gases, and light oils (kinematic viscosity ≤20cst).

Dual Body Configurations (Brass / SS316): Available in high-density brass (cost-effective general-purpose layouts) and precision cast SS316 stainless steel (ideal for light chemical corrosion, high-purity media) to resist harsh environments.

Rigid Threaded Connection with Robust Build: Spanning full sizes from DN10 to DN50, standard pipe threads minimize structural distortion and joint weeping caused by intense mechanical fluid vibrations.

2W Threaded 2-Way 2-Position (Normally Open) Solenoid Valvestructure principle

Structure Diagram:2W Threaded 2-Way 2-Position (Normally Open) Solenoid Valve

Material List


No.Part NameMaterial
1Valve BodyBrass or Stainless Steel
2Body O-ring (None for DN15/20)
3Diaphragm Assembly
4Diaphragm Tension SpringSS304
5Plunge Assembly
6Plunger Internal SpringSS304
7BonnetBrass or Stainless Steel
8Bolt and Spring WasherSS304
9Seat Seal PTFE (O-ring for 2W~25J)
10Armature Tube Assembly
11Solenoid Coil
12NameplateLy12
13Spring Washer 10
14Hex Thin Thread Nut M10×1SS304
15Terminal Box GasketNBR
16Terminal Box DIN43650A
17Terminal Box Fixing Screw


2W Threaded 2-Way 2-Position (Normally Open) Solenoid Valvetechnology parameter

Flow Curve Chart

Specification Sheet


Pipe Thread GOrifice mmCvMin Pressure (bar)Max Pressure (bar)Max Fluid Temp ℃Seal MaterialInsulationES Coil AC 220V (VA)ES Coil DC 24V (W)Brass Body ModelSS304 Body Model
3/8"164.80680/130/120NBR/EPDM/VITONH562W-10NK...2W-10JNK...
1/2"164.80680/130/120NBR/EPDM/VITONH562W-15NK...2W-15JNK...
3/4"207.60680/130/120NBR/EPDM/VITONH562W-20NK...2W-20JNK...
1"25120680/130/120NBR/EPDM/VITONH582W-25NK...2W-25JNK...
1¹/₄"32240680/130/120NBR/EPDM/VITONH882W-32NK...2W-32JNK...
1¹/₂"40290680/130/120NBR/EPDM/VITONH882W-40NK...2W-40JNK...
2"50480680/130/120NBR/EPDM/VITONH882W-50NK...2W-50JNK...

(ES Coil Solenoid Valve Fluid Temp ≤ 80℃)


2W Threaded 2-Way 2-Position (Normally Open) Solenoid Valvestandard size

Outline Diagram:2W Threaded 2-Way 2-Position (Normally Open) Solenoid Valve

Outline Dimension Table   (Unit:mm)

Product ModelA (Brass)A (Stainless Steel)BCDWeight (Kg) - BrassWeight (Kg) - Stainless Steel
2W-10NK68705613111810.9
2W-15NK68705613111810.9
2W-20NK73725614012310.9
2W-25NK100100741681471.61.6
2W-32NK110116851851602.32.2
2W-40NK120122901931652.52.5
2W-50NK1541671152101763.24.2