Bifold Hydraulic Solenoid Valve Indirect Acting FP15/S1/06/32/S/77A-24D/30 – Explosion-Proof Stainless Steel Valve for Hydraulic Control Systems
Introduction to Bifold Hydraulic Solenoid Valve FP15 Series
In complex industrial environments where hydraulic systems operate under high pressure and safety-critical conditions, precision control devices are essential. The Bifold Hydraulic Solenoid Valve Indirect Acting FP15/S1/06/32/S/77A-24D/30 is engineered to provide reliable hydraulic flow control in hazardous areas, ensuring safe and efficient operation across oil & gas, petrochemical, offshore, and heavy industrial facilities.
Designed with 316 stainless steel construction and explosion-proof Ex d certification, this 3-way 2-position indirect acting hydraulic solenoid valve delivers dependable switching performance for hydraulic circuits requiring controlled actuation and safe shutdown capability.
As a professional valve distributor and valve stockist, we supply genuine Bifold hydraulic solenoid valves to support industrial hydraulic systems, emergency shutdown applications, and automation control loops.
What is an Indirect Acting Hydraulic Solenoid Valve?
A hydraulic solenoid valve controls the flow of pressurized hydraulic fluid within industrial systems. Unlike direct acting valves, an indirect acting (pilot-operated) solenoid valve uses system pressure to assist in valve actuation. The solenoid energizes a pilot mechanism, which then uses hydraulic pressure to move the main valve element.
This design provides:
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Efficient operation in higher pressure systems
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Reduced coil power requirement
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Stable switching in larger port sizes
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Improved hydraulic flow capacity
Indirect acting valves are ideal for systems where hydraulic pressure is consistently available and larger flow rates are required.
Product Overview: FP15/S1/06/32/S/77A-24D/30
The Bifold FP15/S1/06/32/S/77A-24D/30 is a high-integrity hydraulic solenoid valve designed for hazardous area and heavy-duty applications.
Core Specifications
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Valve Type: Hydraulic Solenoid Valve
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Operation: Indirect Acting (Pilot Operated)
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Configuration: 3 Way, 2 Position
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Function: Normally Closed (NC)
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Body Material: 316 Stainless Steel
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Connection Size: 3/8” NPT Ports
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Voltage: 24VDC
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Power Consumption: 3.0 Watts
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Explosion Protection: Ex d
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Cable Entry: M20 x 1.5
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Reset Function: Auto Reset
These specifications make the valve suitable for hydraulic control panels, safety systems, and automated industrial machinery.
Key Features and Technical Advantages
1. 316 Stainless Steel Body Construction
Manufactured from 316 stainless steel, this hydraulic solenoid valve provides:
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Superior corrosion resistance
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Compatibility with harsh industrial environments
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Resistance to saltwater and chemical exposure
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Long operational lifespan
This material is widely used in oil & gas, offshore, and petrochemical facilities due to its durability and reliability.
2. Indirect Acting (Pilot Operated) Mechanism
The pilot-operated design offers several advantages over direct acting solenoid valves in hydraulic systems.
Benefits include:
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Efficient operation under higher pressures
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Reduced coil load
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Improved durability
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Smooth and stable actuation
Indirect acting valves are commonly used in systems where consistent hydraulic pressure assists valve movement.
3. 3 Way, 2 Position Configuration
The 3/2 configuration allows for flexible hydraulic control functions such as:
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Hydraulic actuator switching
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Pressure line venting
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Changeover control
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Hydraulic signal routing
This configuration is widely used in automated hydraulic control circuits and safety interlock systems.
4. Normally Closed (NC) Design
The normally closed configuration ensures that:
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The valve remains closed in the absence of electrical power
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Hydraulic flow is blocked during power failure
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Fail-safe operation is maintained
This is critical for safety shutdown systems and high-risk industrial processes.
5. Explosion-Proof (Ex d) Certification
The Ex d explosion-proof rating allows safe installation in hazardous environments where flammable gases or vapors may be present.
Advantages include:
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Compliance with hazardous area regulations
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Reduced ignition risk
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Suitable for oil & gas and refinery environments
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Increased plant safety
Explosion-proof hydraulic solenoid valves are essential in classified industrial zones.
6. 24VDC Low Power Operation
Operating at 24VDC with only 3.0W power consumption, this solenoid valve provides:
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Energy efficiency
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Reduced heat generation
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Reliable integration with PLC and control panels
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Stable electrical performance
Low power consumption improves operational efficiency and system reliability.
7. 3/8” NPT Port Connections
The 3/8” NPT port size allows higher flow capacity compared to smaller ported solenoid valves.
Benefits include:
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Improved hydraulic flow rate
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Suitable for medium-capacity hydraulic circuits
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Standard industrial NPT compatibility
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Easy installation and maintenance
Application Industries
Oil & Gas Industry
Hydraulic solenoid valves are widely used in:
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Emergency shutdown (ESD) systems
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Hydraulic actuator control
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Wellhead control panels
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Blowout preventer systems
Explosion-proof design and stainless steel construction make it ideal for hazardous upstream and downstream operations.
Offshore Platforms
Offshore facilities require corrosion-resistant and hazardous area certified components.
This valve offers:
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Resistance to saltwater corrosion
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Stable performance under vibration
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Long service life in marine environments
Hydraulic systems onboard offshore platforms rely on reliable solenoid valves for safety control.
Petrochemical Plants
In petrochemical facilities, hydraulic systems control:
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High-pressure valve actuation
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Safety interlock systems
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Pressure isolation
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Automated process control
Reliable pilot-operated solenoid valves ensure consistent switching performance.
Power Generation
Hydraulic systems in power plants use solenoid valves for:
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Turbine control
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Hydraulic locking systems
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Safety and protection circuits
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Process control panels
Indirect acting mechanism ensures smooth operation in higher pressure environments.
Other Bifold Hydraulic Solenoid Valve Variants
Additional models in the FP15 series include:
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FP15/S1/06/32/S/77A-24D/ML/30
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FP15/S1/06/32/V/77A-24D/30
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FP15/S1/S1/04/32/S/74AT4-24D/SB/36
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FP15/S2/04/32/S/74AT4-24D/36
These variants may differ in mounting configuration, certification type, and enclosure options to meet specific project requirements.
Integration with Industrial Valve Systems
Hydraulic solenoid valves operate alongside other industrial valves such as:
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Ball valves for isolation
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Gate valves for full shut-off
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Check valves for backflow prevention
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Control valves for modulation
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Safety relief valves for overpressure protection
In automated hydraulic systems, solenoid valves act as pilot devices controlling larger actuated valves.
Installation and Maintenance Considerations
Installation Guidelines
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Ensure proper NPT thread sealing
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Confirm 24VDC power supply compatibility
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Verify hazardous area compliance
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Use certified cable glands for M20 x 1.5 entry
Maintenance Recommendations
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Periodic inspection of coil integrity
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Seal and internal component checks
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Hydraulic fluid cleanliness monitoring
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Functional testing of switching response
Regular maintenance ensures reliable long-term performance.
Why Choose Bifold Hydraulic Solenoid Valve?
Hazardous Area Compliance
Ex d explosion-proof rating ensures safe operation in volatile environments.
Durable Stainless Steel Construction
316 stainless steel body provides corrosion resistance and structural integrity.
Efficient Pilot Operated Design
Indirect acting mechanism ensures stable switching under higher pressures.
Energy Efficient Performance
Low 3.0W power consumption enhances operational efficiency.
Trusted Industrial Brand
Bifold is globally recognized for high-performance instrumentation and solenoid valve solutions.
Our Position as Valve Distributor and Stockist
As a professional valve distributor and valve stockist, we supply genuine Bifold hydraulic solenoid valves for industrial automation and hydraulic systems.
We serve industries including:
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Oil & Gas
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Petrochemical
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Offshore
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Power Generation
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Industrial Manufacturing
In addition to hydraulic solenoid valves, we provide ball valves, gate valves, check valves, control valves, actuators, and safety relief valves to deliver complete industrial valve solutions.
Our technical team provides assistance in product selection, hazardous area verification, and hydraulic system compatibility analysis.
Conclusion
The Bifold Hydraulic Solenoid Valve Indirect Acting FP15/S1/06/32/S/77A-24D/30 is a high-performance, explosion-proof hydraulic solenoid valve designed for demanding industrial applications. With 316 stainless steel construction, 3/8” NPT ports, 3-way 2-position normally closed configuration, 24VDC low power operation, and Ex d certification, it delivers reliable and safe hydraulic control for oil & gas, petrochemical, offshore, and power generation facilities.
For reliable supply from a trusted valve distributor or valve stockist, contact us today for technical consultation and competitive pricing.




