---
product_id: 27657838
title: "1/2\" NPT Brass Electric Solenoid Valve 12-Volt DC (12VDC) FKM/VITON Normally Closed, N/C, Water Air Gas Fuels"
brand: "ehcotech"
price: "S$9"
currency: SGD
in_stock: false
reviews_count: 8
url: https://www.desertcart.sg/products/27657838-1-2-npt-brass-electric-solenoid-valve-12-volt-dc
store_origin: SG
region: Singapore
---

# 12V DC 1/2" NPT 265°F max temp 1/2" NPT Brass Electric Solenoid Valve 12-Volt DC (12VDC) FKM/VITON Normally Closed, N/C, Water Air Gas Fuels

**Brand:** ehcotech
**Price:** S$9
**Availability:** ❌ Out of Stock

## Summary

> 🔧 Unlock Efficiency with Every Flow!

## Quick Answers

- **What is this?** 1/2" NPT Brass Electric Solenoid Valve 12-Volt DC (12VDC) FKM/VITON Normally Closed, N/C, Water Air Gas Fuels by ehcotech
- **How much does it cost?** S$9 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/27657838-1-2-npt-brass-electric-solenoid-valve-12-volt-dc)

## Best For

- ehcotech enthusiasts

## Why This Product

- Trusted ehcotech brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **High Performance:** Handles pressures up to 145 psi with a Cv of 4.8 for optimal flow.
- • **Robust Durability:** Constructed from brass and stainless steel for long-lasting performance.
- • **Efficient Operation:** Energize to open, de-energize to close—simple and effective control.
- • **Precision Engineering:** Crafted with a 1/2" NPT inlet/outlet for seamless integration.
- • **Versatile Applications:** Ideal for water, air, and gas fuels—perfect for diverse setups.

## Overview

This 1/2" NPT Brass Electric Solenoid Valve is designed for 12V DC applications, featuring a normally closed operation, robust brass body, and FKM/Viton diaphragm. It supports a wide range of media, including water, air, and gas fuels, with a maximum pressure of 145 psi and temperature of 265°F, making it a reliable choice for various industrial and commercial uses.

## Description

EHCOTECH has been supplying high quality valves since 2004.   Over 20,000 EHCOTECH 21-Series valves have been delivered to hobbyists, businesses and manufacturers.    EHCOTECH B21V-1/2-CC-12VDC SOLENOID VALVE This is a great general purpose valve for many water, air, fuel, or gas projects.  General  1/2" NPT Ports (0.840" outer thread diameter); NPT is the U.S. standard pipe thread 12-Volt DC 2-way, Normally Closed (energize to open, de-energize to close)FKM (Viton) diaphragm Semi-Direct Acting Valve (allows for good low pressure performance)Large internal orifice (5/8" or 16 mm internal orifice diameter)Cv value: 4.8Pressure and Temperature 0 to 145 psi or vacuumMax media temp: 265° F (130° C)Zero differential pressure valve Gravity feed capable (For best gravity feed performance we recommend EHCOTECH motorized valves) Suitable Media Water, Air, Various Gases  Diesel Fuel, Gasoline, Glycol Other media compatible with FKM (Viton)NOTE: do not use general purpose valves for Natural Gas. Natural Gas valves are optimized for 0 to 0.5 psi range.Electrical 12-volt DC / 1.4 AmpsCoil tempreature will stabilize between 155° and 185° F during long activation periods (typical for general purpose solenoid valves) Contact us regarding applications requiring a very large number of cumulative activation hours  Dimensions Height: 4"Width: 2"Length: 2-3/8"Weight: 1 lb 8 oz

## Features

- 1/2" NPT inlet / outlet port threads | 1/2" or 15 mm internal orifice | 2-way | Unidirectional
- 12V DC coil, 1.4 Amp current draw, 8" lead wires, no polarity requirement for wiring
- Normally Closed (Energize to open, de-energize to close)
- Brass Body, FKM (Viton) diaphragm, Stainless Steel internal parts
- 0 to 145 psi, 265 F max media temp, Cv 4.8

## Product Details

- **Material:** Viton,Brass
- **Brand:** EHCOTECH
- **Exterior Finish:** Stainless Steel
- **Inlet Connection Size:** 0.5 Inches
- **Inlet Connection Type:** National Pipe Tapered
- **Number of Ports:** 2
- **Valve Type:** solenoid valve
- **Manufacturer:** EHCOTECH

## Images

![1/2" NPT Brass Electric Solenoid Valve 12-Volt DC (12VDC) FKM/VITON Normally Closed, N/C, Water Air Gas Fuels - Image 1](https://m.media-amazon.com/images/I/81t-5sjUGWL.jpg)
![1/2" NPT Brass Electric Solenoid Valve 12-Volt DC (12VDC) FKM/VITON Normally Closed, N/C, Water Air Gas Fuels - Image 2](https://m.media-amazon.com/images/I/71SBVATNnuL.jpg)
![1/2" NPT Brass Electric Solenoid Valve 12-Volt DC (12VDC) FKM/VITON Normally Closed, N/C, Water Air Gas Fuels - Image 3](https://m.media-amazon.com/images/I/71DPUfrXHOL.jpg)

## Questions & Answers

**Q: Will this piece work for auxiliary tank in the back of my truck to gravity feed to the main tank for diesel fuel**
A: Yes it will work for gravity feed of liquids.

**Q: What is the air cfm rate on this solenoid?  need reply asap**
A: Flow rates are dependent on pressure. At 100 psi, you can expect approximately 14 CFM with air. At 120 psi, you can expect approximately 18 CFM.

**Q: Is this valve suitable for propane? Low pressure regulated side for a stove.**
A: I don't think I would use it for that I think it said not to use it for gasses it's great for air and water

**Q: Is there a flow rate specification? I need at least 3 GPM at a 5 PSI in/out difference with water.**
A: The Cv value is 4.8. Based on the Cv value and your 5 psi pressure differential between inlet and outlet side, this valve will flow significantly more than 3 GPM.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works well on gravity-fed irrigation system.
*by A***X on January 19, 2019*

I bought this unit to use in an irrigation system that mounts on my tractor for watering a new small orchard. With the switch mounted on the tractor fender and this valve mounted inline with the water tank discharge line, I can pull up next to each tree, flip the switch, start my timer, sit back and listen to my music before moving down the row. (Since I couldn't find the 3/4" model at the time, this model takes 2.5 minutes to release 5 gallons of water; I have since purchased a 3/4" model for use this summer in hopes of saving more time). No complaints and works well despite the reduced flow compared to a larger valve.

### ⭐⭐ Worked for a week in brief 130F intervals
*by S***T on July 27, 2019*

I made a hot running hydrogen fuel cell for the car and there is a float valve that turns this guy on. I only drive the car for maybe 2 20-30 minute periods and the liquid heats up to 130 at around the 15 minute mark. The heat from the cell feeds through the line back to this solenoid.I noticed my cell kept filling past the float valve, and eventually filled the entire cell to the top which means I had to take it out so it wouldn't flood into the line and hydrolock the car (it actually did that at one point). It's been leaking. I unplugged everything and it just dripped constantly. It also reverse feeds the fluid from the cell through the solenoid back into the container over night as the level returns to level with what's in the refill reservoir.265 degree rating? Maybe for 12 minutes. It couldn't stand up to the occasional 130 for 5-10 minutes for a week's time. It's also under a strong state of engine vacuum so that doesn't help matters. Next time I'll have to go to an American manufacturer to get something more high end.If you're using it with low pressure and no heat it might work well for a long time. Just not under moderate heat and vacuum. The only way I could use this would be if I used a tube and fin cooler with a squirrel cage fan blowing across it.

### ⭐⭐⭐⭐⭐ Diesel Transfer Pump Shut Off
*by H***R on October 8, 2018*

I waited a while before doing this review because I thought it was leaking. It ended up being a connection that I did not seal up well. I used the liquid sealer for fuel lines and now I have no more leaks. I am using this on a transfer pump on my diesel and have no issues at all. I may update with some pictures when I get a chance. It has worked flawlessly now for 5 months!

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-02-10*