Introduction

A direct-acting explosion-proof solenoid valve is a control element in which the valve core is directly driven by an electromagnetic coil, used to control the opening and closing of the gas path without a pilot gas source.

Specification

TYPE 1

Stainless Steel 316 Flameproof Coil, IP67, CNOMO-30 Connection
Working Voltage	24/110 VDC-3.5W;110/120/220/240VAC-4VA(50/60HZ)
Working Medium	Less than 40μm filtered and dried air,0～8 bar
Flow rate (Orifice)	CV=0.08(1.3mm), Optional CV=0.42(3mm)
Function & Air Port	3/2 direct acting, spring return, NC&ø3mm
Working Temperature	-20℃～60℃,Optional-40℃～60℃
Area Classification	Exd IIC T6Gb (Class l Zone 1)

TYPE 2

Stainless Steel 316 Flameproof Coil, IP67, Namur Connection
Working Voltage	24/110 VDC-3.5W, ≤1W; 110/120/220/240VAC-4VA(50/60HZ)
Working Medium	Less than 40µm filtered and dried air, 0～8 bar
Flow Rate (Orifice)	CV=0.08 (1.3mm)
Function & Air Port	3/2 direct acting, spring return, NC & 1/4"G(NPT)
Working Temperature	-20°C～60°C
Area Classification	Ex db IIC T6 Gb, Ex tb IIIC T85°C Db
Cable Entry	M20-1.5, Optional 1/2"NPT

Features

Easy Configuration: Utilizing a direct-acting structure, the valve core is directly driven to open and close by an electromagnetic coil. It operates within the 0–8 bar range without relying on pilot pressure, thus reducing the need for pilot air circuits, additional valves, and related piping.

Low Risk: Direct-acting operation does not rely on differential pressure to establish opening and closing conditions. It can still complete switching operations near 0 bar or under pressure fluctuations, thus avoiding operational failures due to insufficient differential pressure.

Safety: The coil uses a 316 stainless steel explosion-proof structure, meeting Ex d IIC T6 Gb standards and possessing IP67 protection capabilities. It can be directly installed in explosion-proof areas such as Zone 1, reducing the need for additional protective devices and wiring costs associated with remote installation.

Low Maintenance: The valve body is suitable for filtering dry air ≤40μm. Combined with a small-diameter (1.3 mm/3 mm) flow channel and spring return structure, the short stroke of moving parts and controlled contact surface reduce wear and replacement frequency under repetitive operating conditions.

Applications

Oil and Gas Industry: Used in control loops without a stable gas source or at low pressure to directly switch actuators or control gas paths.

Chemical Industry: Applied in pneumatic control systems in hazardous areas, directly driving gas path switching via electrical signals.

Power Industry: Used in auxiliary control systems to achieve pneumatic actuation of equipment start/stop signals.

Explosion-Proof Industrial Environments: Suitable for areas containing explosive gases or dust, enabling on-site gas path control and signal execution.

FAQ

Q: How to choose between direct-acting and pilot-operated valves?

A: When the system air pressure is low or there is a need for pressureless start-up, a direct-acting structure should be selected. If the air supply is stable and a large flow rate needs to be controlled, a pilot-operated type can be considered to reduce the coil load.

Q: What are the requirements for air supply quality?

A: Filtered (≤40μm) and dry compressed air must be provided to prevent particles or moisture from entering the valve cavity and affecting the valve core's operation and sealing performance.

Q: How to choose the installation method?

A: Direct installation or pipe connection (such as NAMUR or threaded interface) can be selected according to the system layout. When selecting, the interface specification (such as G1/4 or NPT) and cable inlet type (M20 or 1/2" NPT) must be confirmed to match the site conditions.

Hot Tags: direct acting explosion proof solenoid valve, China direct acting explosion proof solenoid valve manufacturers, suppliers, factory, solenoid valves, Pilot Acting Explosion Proof Solenoid Valve, Direct Acting Explosion Proof Solenoid Valve