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2W-A 2/2-Way (Normally Closed) Solenoid Valve

2W-A 2/2-Way (Normally Closed) Solenoid Valve

  • Model:2W-A-8N/2W-A-10N/2W-A-15N
  • Specification:DN8-DN15
  • Temperature:-20~65 ℃
  • Medium:Water, Liquid, Gas, Light Oil(≤20cst)
  • Pressure:0~20bar
  • Connection method:Threaded
  • Driving method:Direct-acting
  • Material:Brass, SS316 Stainless Steel
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2W-A 2/2-Way (Normally Closed) Solenoid ValveOverview

The 2W-A series (DN8-DN15) 2/2-way threaded solenoid valve is an industrial-grade automated fluid shut-off valve designed for general 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 pure direct-acting structure, supporting zero differential pressure (0 bar) lightweight startup. The valve's opening and closing sequences are directly driven by electromagnetic force acting on the moving plunger core, functioning entirely independently of the pipeline medium's internal pressure differential. The valve body is constructed from premium brass or high-strength SS316 stainless steel, fitted with standard female pipe threads to simplify installation within space-restricted configurations. Powered by a heavy-duty electromagnetic coil and precision-engineered return springs, it performs reliably across an ultra-wide nominal pressure spectrum of 0 to 20 bar and operating temperatures from -20°C to 65°C, delivering absolute zero-leakage isolation and remote automated control for advanced engineering systems.

Product Image:2W-A 2/2-Way (Normally Closed) Solenoid Valve

2W-A 2/2-Way (Normally Closed) Solenoid ValveCharacteristic

Pure Direct-Acting Mechanism & Zero-Pressure Reliability: 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 due to insufficient pressure differentials.

0 to 20 bar Ultra-Wide Pressure Spectrum: Equipped with industrial heavy-duty power coils optimized via electromagnetic magnetic-field simulation. Combined with a short-stroke, lightweight plunger core, it delivers exceptional high-pressure cut-off capabilities up to 20 bar in a direct-acting layout.

Dual Body Material Configurations (Brass / SS316): Available in high-density brass (ideal for standard cost-effective applications) and precision cast SS316 stainless steel (ideal for light chemical corrosion, high-purity media, and harsh conditions) to accommodate varying plant environments.

Threaded Connection for Rapid Integration: Standard international pipe threads minimize redundant volume and deadweight compared to traditional automated valves, facilitating swift installation and modular online maintenance within compact spaces.

Precision Sealing with Millisecond Responsiveness: The fluid-dynamics optimized valve seat linear seal boundary ensures minimal internal flow resistance. Paired with anti-fatigue stainless steel springs and high-grade elastomeric seals, switching speeds are executed within milliseconds (ms) alongside absolute bubble-tight shut-off.

2W-A 2/2-Way (Normally Closed) Solenoid Valvestructure principle

Structure Diagram:2W-A 2/2-Way (Normally Closed) 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-A 2/2-Way (Normally Closed) Solenoid Valvetechnology parameter

Flow Curve Chart

Specification Sheet


Orifice mmPort Thread GCv ValueMin. Working Pressure (bar)Max. Working Pressure (bar) AC220VMax. Working Pressure (bar) DC24VMax. Fluid Temp. ℃Seal MaterialCoil Insulation ClassStandard Coil Power AC220V (VA)Standard Coil Power DC24V (W)ES Coil Power AC220V (VA)ES Coil Power DC24V (W)Regular Ordering Model Brass BodyRegular Ordering Model SS316 Body
101/4"2.10201680NBRH2213642W-A-08-AC2202W-A-08J-AC220
101/4"2.102016130EPDMH22132W-A-08-E-AC2202W-A-08J-E-AC220
101/4"2.102016120VITONH22132W-A-08-V-AC2202W-A-08J-V-AC220
103/8"2.10201680NBRH2213642W-A-10-AC2202W-A-10J-AC220
103/8"2.102016130EPDMH22132W-A-10-E-AC2202W-A-10J-E-AC220
103/8"2.102016120VITONH22132W-A-10-V-AC2202W-A-10J-V-AC220
101/2"2.10201680NBRH2213642W-A-15-AC2202W-A-15J-AC220
101/2"2.102016130EPDMH22132W-A-15-E-AC2202W-A-15J-E-AC220
101/2"2.102016120VITONH22132W-A-15-V-AC2202W-A-15J-V-AC220

Note: Working pressure is applicable for Air, Gas, Water, Hot water, Liquid, Light oil. The voltage in the table below is AC220V, and the body connection is G thread. Seal material: Blank for NBR, E for EPDM, V for VITON. Note: When using ES coil solenoid valves, EPDM or VITON seals can be selected, but the fluid temperature must be ≤80℃.


2W-A 2/2-Way (Normally Closed) Solenoid Valvestandard size

Outline Diagram:2W-A 2/2-Way (Normally Closed) Solenoid Valve(Dim. as shown)