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  • 2W-SL Flange and Union Connection Plastic Solenoid Valve

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2W-SL Flange and Union Connection Plastic Solenoid Valve

2W-SL Flange and Union Connection Plastic Solenoid Valve

  • Model:2W-15SL-F/2W-20SL-F/2W-25SL-F/2W-32SL-F/2W-40SL-F/2W-50SL-F
  • Specification:DN15-DN50
  • Temperature:-10~50 ℃
  • Medium: Water, Liquid, Gas
  • Pressure:0~6bar
  • Connection method:Union Connection, Flanged Connection
  • Driving method:Semi-direct Acting
  • Material:PA66 (Nylon 66); Union & Flange Material: PVC
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2W-SL Flange and Union Connection Plastic Solenoid ValveOverview

The 2W-SL Series Flange & Union Plastic Solenoid Valve is a 2-way, 2-position, semi-direct acting (assisted-lift) diaphragm solenoid valve specifically engineered for high-flexibility piping and highly corrosive fluid control. While inheriting the core advantage of zero differential pressure startup, this series comprehensively upgrades the pipeline connection mechanism by innovatively integrating a dual Flange and Union structure (also known as a true union flange connection). The valve body is precision-molded from premium reinforced engineering plastics (such as UPVC, PP, or PA66), offering remarkable acid/alkali resistance, anti-corrosion properties, and a lightweight design. Its semi-direct acting configuration guarantees instantaneous on/off response even at zero pipeline pressure (0 Bar). The unique union-flange design significantly simplifies field installation, pipeline alignment, and subsequent disassembly for maintenance. It is widely applied in chemical acid/alkali pipelines, water treatment plants, electroplating and pickling lines, industrial wastewater discharge, textile printing/dyeing, and automated specialized equipment.

Product Image:2W-SL Zero Differential Pressure Plastic Solenoid Valve

2W-SL Flange and Union Connection Plastic Solenoid ValveCharacteristic

Dual Flange & Union Connection: The hybrid design combining a union nut and a flange provides both the high-pressure endurance of a flanged joint and the flexible, non-destructive disassembly of a union. This drastically reduces installation difficulties in multi-valve manifolds or confined spaces.

Zero Differential Pressure Capability: Equipped with an assisted-lift diaphragm structure, the valve operates reliably across a pressure range of 0 to 7 Bar without requiring a minimum pressure drop or fluid backpressure.

All-Plastic Corrosion-Resistant Body: Specifically tailored for chemical and high-purity fluids, the valve body (available in UPVC or PP) completely eliminates metallic oxidation and corrosion in aggressive acid, alkali, or salt-mist environments, preventing secondary fluid contamination.

Premium Seals & High Flow Capacity: Fitted with a long-life NBR diaphragm as standard (EPDM or Viton available upon request). The internal flow path features a large-orifice, low-resistance design to ensure excellent flow rates and high Cv factors.

Industrial Protection Coil: Rated at IP65 with a standard DIN junction box, the coil ensures a low temperature rise and robust encapsulation, effectively resisting dusty, humid, and mildly corrosive atmosphere inside industrial workshops.

2W-SL Flange and Union Connection Plastic Solenoid Valvestructure principle

Structure Diagram:2W-SL Zero Differential Pressure Plastic Solenoid Valve

Material List


No.Part NameMaterial
1Valve BodyPA66
2Body O-ring (None for DN15/20)
3Diaphragm Assembly
4Diaphragm Tension SpringSS304
5Plunge Assembly
6Plunger Internal SpringSS304
7BonnetPA66
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-SL Flange and Union Connection Plastic Solenoid Valvetechnology parameter

Specification Sheet


Product ModelDN (mm)A (mm)H (mm)PN=1.6MPa Flange Dimension D (mm)PN=1.6MPa Flange Dimension K (mm)PN=1.6MPa Flange Dimension d (mm)PN=1.6MPa Flange Dimension C (mm)PN=1.6MPa Flange Dimension f (mm)PN=1.6MPa Flange Dimension n-Φ
2W-15SL-F151261399565461424-Φ14
2W-20SL-F2013614510575561624-Φ14
2W-25SL-F2517015311585651624-Φ14
2W-32SL-F32208203140100761824-Φ18
2W-40SL-F40217215150110841824-Φ18
2W-50SL-F50215235165125992034-Φ18


2W-SL Flange and Union Connection Plastic Solenoid Valvestandard size

Outline Diagram:2W-SL Zero Differential Pressure Plastic Solenoid Valve

Outline Dimension Table   (Unit:mm)


Product ModelDN (mm)A (mm)H (mm)PN=1.6MPa Flange Dimension D (mm)PN=1.6MPa Flange Dimension K (mm)PN=1.6MPa Flange Dimension d (mm)PN=1.6MPa Flange Dimension C (mm)PN=1.6MPa Flange Dimension f (mm)PN=1.6MPa Flange Dimension n-Φ
2W-15SL-F151261399565461424-Φ14
2W-20SL-F2013614510575561624-Φ14
2W-25SL-F2517015311585651624-Φ14
2W-32SL-F32208203140100761824-Φ18
2W-40SL-F40217215150110841824-Φ18
2W-50SL-F50215235165125992034-Φ18