2S012-020 Series
This valve is a two-way, normally closed, direct-acting valve & does not require a minimum differential pressure to operate. As shown in the diagrams below, when the coil is de-energized (left diagram), the plunger rests on the main orifice & is held in place by the plunger spring force, sealing the valve. When the coil is energized (right diagram), the solenoid lifts the plunger & allows the working medium to flow through the orifice. The working medium & flow direction are indicated in purple in the diagrams
Product Specifications
Valve Model 2S012-1/8A 2S012-1/4A 2S020-1/8A 2S020-1/4A Port Size 1/8” NPT 1/4” NPT 1/8” NPT 1/4” NPT Orifice 1.2mm 1.2mm 2.0mm 2.0mm Flow Coefficient (Cv) 0.05 0.05 0.15 0.15 Valve Type 2 Way, Normally Closed (NC) 2 Way, Normally Closed (NC) 2 Way, Normally Closed (NC) 2 Way, Normally Closed (NC) Action Direct Acting (Poppet)
Fast Response Time: <20msec
Direct Acting (Poppet)
Fast Response Time: <20msec
Direct Acting (Poppet)
Fast Response Time: <20msec
Direct Acting (Poppet)
Fast Response Time: <20msec
Wetted Surfaces Valve Body: Stainless Steel Seal: NBR (Buna N), or Viton (FKM)
Armature Assembly: Stainless Steel
Valve Body: Stainless Steel Seal: NBR (Buna N), or Viton (FKM)
Armature Assembly: Stainless Steel
Valve Body: Stainless Steel Seal: NBR (Buna N), or Viton (FKM)
Armature Assembly: Stainless Steel
Valve Body: Stainless Steel Seal: NBR (Buna N), or Viton (FKM)
Armature Assembly: Stainless Steel
Seal Material Standard Option: NBR (Buna N)
Upgrade Option: Viton (FKM)
Standard Option: NBR (Buna N)
Upgrade Option: Viton (FKM)
Standard Option: NBR (Buna N)
Upgrade Option: Viton (FKM)
Standard Option: NBR (Buna N)
Upgrade Option: Viton (FKM)
Operating Temperature Media with NBR Seal: 14°F to 176°F (-10°C to 80°C) Media with Viton Seal: 5°F to 248°F (-15°C to 120°C) Media with NBR Seal: 14°F to 176°F (-10°C to 80°C) Media with Viton Seal: 5°F to 248°F (-15°C to 120°C) Media with NBR Seal: 14°F to 176°F (-10°C to 80°C) Media with Viton Seal: 5°F to 248°F (-15°C to 120°C) Media with NBR Seal: 14°F to 176°F (-10°C to 80°C) Media with Viton Seal: 5°F to 248°F (-15°C to 120°C) Operating Pressure Vacuum to 200 PSI Vacuum to 200 PSI Vacuum to 150 PSI Vacuum to 150 PSI Electrical Connections D: DIN 43650, Form B
G: Grommet E: Explosion Proof Coil (200C-E) 1/2” NPT Conduit Connection with 24in Three-Strand Wires ATEX: Explosion Proof Coil (200C-ATEX) DIN43650B Connection with 10ft Three-Wired Cable and Sleeve
D: DIN 43650, Form B
G: Grommet E: Explosion Proof Coil (200C-E) 1/2” NPT Conduit Connection with 24in Three-Strand Wires ATEX: Explosion Proof Coil (200C-ATEX) DIN43650B Connection with 10ft Three-Wired Cable and Sleeve
D: DIN 43650, Form B
G: Grommet E: Explosion Proof Coil (200C-E) 1/2” NPT Conduit Connection with 24in Three-Strand Wires ATEX: Explosion Proof Coil (200C-ATEX) DIN43650B Connection with 10ft Three-Wired Cable and Sleeve
D: DIN 43650, Form B
G: Grommet E: Explosion Proof Coil (200C-E) 1/2” NPT Conduit Connection with 24in Three-Strand Wires ATEX: Explosion Proof Coil (200C-ATEX) DIN43650B Connection with 10ft Three-Wired Cable and Sleeve
Coil Power 3-6.5W 3-6.5W 3-6.5W 3-6.5W Coil Duty 100% ED (Continuous Duty) 100% ED (Continuous Duty) 100% ED (Continuous Duty) 100% ED (Continuous Duty) Voltage Options 12VDC, 24VDC, 24VAC, 110/120VAC (50/60Hz), 220/240VAC (50/60Hz) 12VDC, 24VDC, 24VAC, 110/120VAC (50/60Hz), 220/240VAC (50/60Hz) 12VDC, 24VDC, 24VAC, 110/120VAC (50/60Hz), 220/240VAC (50/60Hz) 12VDC, 24VDC, 24VAC, 110/120VAC (50/60Hz), 220/240VAC (50/60Hz) Voltage Tolerance ±10% of Specified Voltage ±10% of Specified Voltage ±10% of Specified Voltage ±10% of Specified Voltage Ingress Protection IP65 IP65 IP65 IP65 Insulation Class H Class H Class H Class H Class Installation No Orientation Requirement
Optimum Position: Flow Horizontal and Solenoid Vertical
No Orientation Requirement
Optimum Position: Flow Horizontal and Solenoid Vertical
No Orientation Requirement
Optimum Position: Flow Horizontal and Solenoid Vertical
No Orientation Requirement
Optimum Position: Flow Horizontal and Solenoid Vertical
Service Liquid, Water, Oil, Air Liquid, Water, Oil, Air Liquid, Water, Oil, Air Liquid, Water, Oil, Air Installation Instructions
To Connect the Valve Inlet & Outlet:
• Connect the inlet & outlet to the valve ports according to the flow direction arrow marked on the valve To
Install the Coil:
• Put the coils on to the armature tube of the valve. Place the lock washer & nut on to the armature tube. Hand tighten the nut, then use a wrench to tighten the nut another quarter-turn. Do not over-tighten the nut, as it may cause the armature tube to fail prematurely.
To Connect a DIN Coil:
1. Remove the Philips-head screw from the plastic DIN housing & unplug it from the DIN coil
2. From the screw opening, push the terminal block out from the plastic DIN housing.
3. Note the “1”, “2”, and ground “⏚” symbols on the underside of the DIN enclosure.
4. For DC DIN Coils, connect “1” to your Positive Lead & “2” to your Negative lead.
5. For AC DIN Coils, connect “1” to your HOT lead, “2” to your Neutral lead, & “⏚” to your ground if required.
Do not energize the coil without installing it onto the valve or connect the coil to a different voltage than specified. This will burn the coil and could create fire hazards.
Safety Note: Standard valves are supplied with continuous duty coils. The proper class of insulation for the service is indicated on the coil body. The coil temperature may rise significantly if energized for extended periods—this is normal. Although the coil is made of flame-retardant material, misuse of the coil could create fire hazards & generate smoke and/or a burning odor. If these conditions are encountered, the coil temperature has risen above safe levels and the power should be disconnected immediately.
Material Test Reports
This document certifies that STC products have been subjected to quality assurance procedures and meet the material and performance specifications published by Sizto Tech Corporation (STC). The products have been manufactured, processed, inspected, and tested according to STC internal requirements and ISO 9001 standards.
ISO 9001:2015 Certificate Number: Qnb17180318
Date of Issue: 01, March, 2018
Valid Until: 28, February, 2021
Individual materials and components used in this product have been tested and conform to applicable published standards according to chart below. Please be advised that STC does not conduct its own material analysis of all raw materials, rather, STC relies on the statements of its material suppliers & reserves the rights to independently test raw materials if necessary. Material Test Reports may be available for specific products upon request.
Material Use Locations Material Standard 316 Stainless Stee Metal Fittings, Valves, Air Cylinders ASTM A240/A2666 304 Stainless Stee Valves, Air Cylinders ASTM A240/A666 CF8M Stainless Steel Valves ASTM A351/A743 Brass Valves ASTM B36/B62 Nickel-Plated Brass Composite Fittings ASTM B456/B927 Acetal Homopolymer (Delrin) Valves ASTM D4181/D6778—14 Acetal Copolymer (POM) Composite Fittings ASTM D4181/D6778—14 FKM (Viton) Seals ASTM D1418 PTFE (Teflon) Valves,Seals ASTM D3294—15 NBR (Buna N) Seals ASTM D1387—06 EPDM Seals ASTM D3568—03 Polybutylene Terephthalate (PBT) Composite Fittings ASTM D4000