General Purpose Solenoid Valves
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General purpose solenoid valves open and close the flow of water, air, neutral gases, light oils and liquids on an electrical signal. The Unox GEM series has an MS 58 brass body and comes in normally closed (NC), normally open (NO), 3/2-way and high-pressure (up to 40 bar) versions, in sizes from 1/8″ to 2″.
Contents
Models and Sizes
| Model | Code | Function | Size | Working pressure | Fluid temperature |
|---|---|---|---|---|---|
| General Purpose Solenoid Valve – Normally Closed | GEM1110 – GEM1118 | Normally closed (NC) | 1/8″ – 2″ | 0–100 bar (1/8″–1/4″) 0.5–16 bar (3/8″–2″) | -10/+130 °C (1/8″–3/8″) -10/+90 °C (1/2″–2″) |
| General Purpose Solenoid Valve – Normally Open | GEM1112A – GEM1118A | Normally open (NO) | 3/8″ – 2″ | 0.5–16 bar (3/8″–1″) 0.5–12 bar (1 1/4″–2″) | -10/+90 °C |
| General Purpose Solenoid Valve – 3/2 Normally Closed | GEM1119 – GEM1120 | 3/2-way, NC | 1/8″ – 1/4″ | 0–10 bar | -10/+90 °C |
| High Pressure General Purpose Solenoid Valve – Normally Closed | GEM1112YB – GEM1115YB | Normally closed (NC) | 3/8″ – 1″ | 0.5–40 bar | -10/+150 °C |
| High Pressure General Purpose Solenoid Valve – Normally Open | GEM1112YBA – GEM1115YBA | Normally open (NO) | 3/8″ – 1″ | 0.5–40 bar | -10/+90 °C |
Common Specifications
| Body | MS 58 brass |
|---|---|
| Connection | Threaded, BSP (NPT on request) |
| Sleeve / core | AISI 316 sleeve, 430F stainless core |
| Coil | IP65, class H, 100% ED |
| Diaphragm and seal options | NBR (-10/+80 °C), EPDM (-10/+130 °C), Viton (-10/+160 °C), PTFE (-10/+180 °C) |
| Response time | Opening 30 ms, closing 90 ms |
How Does It Work?
With the coil de-energised the valve is closed. When the coil is energised, the core is pulled up, the pilot orifice opens and the pressure difference lifts the diaphragm to let the medium flow. When power is removed, the valve closes.
With the coil de-energised the valve is open and the medium flows freely. When the coil is energised the valve closes; when power is removed it opens again.
A 3/2-way valve has three ports. De-energised, the inlet is closed and the outlet is open to exhaust; energised, the inlet is connected to the outlet. It is used to control pneumatic cylinders and actuators.
Applications
- Water and irrigation lines
- Compressed air
- Neutral gases
- Light oils and liquids
- Machinery and automation
Selection and Installation
Working pressure and fluid temperature depend on the size; the values for each model are given in the table. Install the solenoid valve with the coil on top and fit a strainer upstream. For high temperatures, specify the diaphragm and seal material when ordering. Specify the coil voltage (AC/DC) when ordering.
Related categories: Stainless Steel General Purpose Solenoid Valves, Steam Solenoid Valves.
See our solenoid valves category for all models, and our what is a solenoid valve guide for types and working principles.