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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


Due to the rapid R&D iteration speed of valve products from China kaiweixi Valve Group Co., Ltd., the above technical parameters and specification documents, including product overview, features, parts materials, outline dimension charts, CAD drawings, and product instruction manuals, are for your reference only. For actual applications, please contact our valve sales engineers to obtain the support you need for free. Thank you!