1" Low Pressure Gas Solenoid Valve - N/O
Availability: In Stock
Technical Details
SKU
BCM-25K
Position
Normally Open
Port Size
1" Female NPT
Available Voltage
Select Above
Body Material
Brass
Components
Stainless Steel
Seal Material
NBR Diaphragm
Orifice Size
25 mm
Temp Range
15 to 140°F / -10 to 60°C
Pressure Range
0 - 60 PSI (No Minimum Pressure)
Flow Rate
Cv 12 (Appx 92 GPM @ 60 PSI)
Power
AC: 40 VA / DC: 32 Watts
Coil Connection
DIN 43650A
Coil Class
Class H (356°F )
Response Time
Fast Acting (Less than one second)
Duty Cycle
100% Duty at Rated Ambient Temperature
*Suitable Media
Natural Gas, Propane, Inert Gases
Weight
1 lbs.
Height
5.31"
Length
3.94" port to port
Width
2.91"
CAD Files
Available Upon Request
Product Overview
The BCM-25K is a heavy-duty 1" brass solenoid valve engineered for high-flow, low-pressure, and zero-differential gas control applications. Featuring an internal mechanical spring assist and a flexible NBR diaphragm, this valve guarantees a positive, airtight seal at 0 PSI where standard pilot-assisted solenoid valves fail to function.
Important Application Notice:
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- This valve is Normally Open (remains open when de-energized and closes when powered). It is not suitable for primary fuel-gas safety shutoff, as power loss will allow gas to flow.
- This configuration is specifically intended for specialized setups such as double-block-and-bleed vent lines, high-capacity purge manifolds, and atmospheric relief systems.
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Key Features
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Zero Differential Operation: Direct-assist spring mechanism ensures reliable seating under zero line pressure or minimal differential.
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Normally Open Configuration: Remains open when de-energized to provide immediate, unrestricted venting during power failures.
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Heavy-Duty Construction: Solid brass body, stainless steel internal components, and nitrile (NBR) seals optimized for natural gas, propane, and inert gases.
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High Volumetric Flow: Full 1" female NPT ports designed to accommodate high flow rates in industrial gas headers and vent trains.
Common Applications
- Main atmospheric vent/bleed legs in NFPA 86 and CSD-1 double-block-and-bleed burner trains
- High-volume low-pressure natural gas and propane ventilation manifolds
- Industrial boiler, kiln, and thermal oxidizer pressure relief lines
- Large-scale inert gas blanketing (Nitrogen, Argon) and distribution systems
- Heavy process equipment purge and emergency exhaust systems
Installation Note
- This valve is directional.
- Align gas flow with the directional arrow cast into the brass body. Backpressure or backflow will disrupt the internal diaphragm balance and prevent proper sealing.
- Always verify gas compatibility, operating pressures, and local mechanical safety codes before installation.
Wiring Instructions
- Loosen and remove the Phillips-head screw securing the DIN connector to the coil.
- Detach the DIN connector from the coil.
- Open the DIN connector housing by prying at the small slot located in the bottom corner next to the Earth terminal.
- Inside the housing, locate the screw terminals:
- Terminal 1: Connect the hot or positive wire.
- Terminal 2: Connect the neutral or negative wire.
- Earth Terminal (for AC voltages only): Connect the ground or Earth wire.
- Ensure all screw terminals are securely tightened for a reliable connection.
- Reassemble the DIN connector by reversing the steps above.
