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Help Center2-Way Normally Closed Compact Plunger Valve 3/4" BSP Mobile Hydraulic Oil Circuit 420 Bar
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Shanghai Zhibang Valve Manufacture Co., Ltd. is proud to introduce our 2-Way Normally Closed Compact Plunger Valve with a 3/4" BSP connection, designed specifically for mobile hydraulic oil circuits operating at up to 420 Bar. As a dedicated manufacturer since 2016 with an annual export value of US$1 million to US$1.5 million, we understand the demands of heavy-duty mobile equipment. This valve combines compact dimensions with robust performance, ensuring reliable flow control in confined spaces. Whether you need a failsafe normally closed configuration for safety or a high-pressure solution for excavators, loaders, or agricultural machinery, our plunger valve delivers consistent performance.
Our ISO9001-certified production processes guarantee that every valve meets stringent quality standards. The compact design allows installation where space is limited, while the 3/4" BSP thread ensures compatibility with common hydraulic fittings. The plunger mechanism provides smooth, positive shut-off, minimizing leakage and wear. With a maximum working pressure of 420 Bar, this valve is engineered for the most demanding mobile hydraulic applications.
Key Features & Benefits
- Compact Form Factor: Saves critical space in mobile equipment hydraulic systems, allowing easier installation and maintenance.
- Normally Closed Operation: Spring-return ensures the valve stays closed when not actuated, providing fail-safe operation for safety-critical circuits.
- High Pressure Capability: Rated for 420 Bar (6090 PSI), suitable for high-pressure mobile hydraulics like excavators, cranes, and forestry equipment.
- 3/4" BSP Connection: Standard British Standard Pipe thread enables direct connection to common hydraulic hoses and fittings without adapters.
- Robust Plunger Design: Hardened steel plunger with precision lapped seats ensures minimal internal leakage, long service life, and reliable sealing.
- Wide Application Range: Ideal for mobile hydraulic oil circuits in construction, agriculture, mining, and material handling equipment.
- Optional Materials: Available in carbon steel or stainless steel body to suit different fluid compatibility and environment requirements.
Technical Specifications
| Parameter | Value |
| Valve Function | 2-Way Normally Closed |
| Connection Type | 3/4" BSP (parallel thread) |
| Max. Operating Pressure | 420 Bar (6090 PSI) |
| Body Material | Carbon steel (optional stainless steel) |
| Seal Material | NBR / FPM (optional) |
| Operating Temperature | -20°C to +80°C (standard) |
| Flow Direction | Unidirectional (specified by arrow) |
| Actuation | Manual or hydraulic pilot (optional) |
Why Choose Our Valve?
Our plunger valve is manufactured with advanced CNC machining and rigorously tested for leak-free performance. The compact envelope reduces weight and installation space, which is critical for mobile equipment where every kilogram counts. The normally closed design ensures that in the event of system pressure loss, the valve automatically closes, preventing unintended movement or fluid loss. This feature is particularly valuable for load-holding circuits and safety interlocks.
Compared to standard ball valves or spool valves, the plunger design offers superior sealing and resistance to contamination. The simple construction also means easier maintenance and lower replacement costs. With a 3/4" BSP port, the valve integrates seamlessly into existing hydraulic systems without modification.
Customer Benefits
- Enhanced Safety: Normally closed function prevents accidental activation and maintains system integrity.
- Space Savings: Compact design allows installation in tight engine bays or under-cabinet areas.
- Reduced Downtime: Reliable sealing and durable materials minimize leaks and maintenance intervals.
- Global Compatibility: 3/4" BSP thread is widely used in European, Asian, and many international markets.
- Cost-Effective: Competitive pricing without compromising quality, backed by our ISO9001 management system.
Trust in Our Company
Since 2016, Shanghai Zhibang Valve Manufacture Co., Ltd. has been a reliable partner for hydraulic valve solutions worldwide. Our annual export value of US$1 million to US$1.5 million reflects the trust placed by customers across North America, South America, Europe, Southeast Asia, Africa, Oceania, and the Middle East. We ship from major ports including Shanghai, Guangzhou, Hong Kong, and Beijing, ensuring timely delivery. Our ISO9001 certification underscores our commitment to quality management and continuous improvement.
We stand behind every valve with prompt technical support and after-sales service. Whether you need a standard 2-way normally closed plunger valve or a customized version with different seals or materials, we are ready to discuss your requirements. Contact us today to request a quote, sample, or technical drawing. Let us help you optimize your mobile hydraulic system with a valve that delivers performance, reliability, and value.
Frequently Asked Questions
Q1: What is the maximum pressure this valve can handle?
A: The valve is rated for a maximum working pressure of 420 Bar (6090 PSI). It is tested to withstand pressure spikes within safe limits.
Q2: Can this valve be used for water or other fluids?
A: It is designed for hydraulic oil circuits. For water or other fluids, please consult with us for seal material compatibility. Options include NBR, FPM, or EPDM.
Q3: What is the difference between normally closed and normally open?
A: Normally closed means the valve is closed when no actuation force is applied; it opens only when actuated. This provides fail-safe closure in case of power or pressure loss.
Q4: Is the 3/4" BSP thread suitable for high-pressure systems?
A: Yes, 3/4" BSP is a standard thread for hydraulic connections up to 420 Bar when properly sealed with an O-ring or copper washer.
Q5: Does the valve come with mounting brackets?
A: The valve body has standard mounting holes for brackets. Brackets are available as optional accessories upon request.
Q6: What is the body material? Is stainless steel available?
A: The standard body is carbon steel. Stainless steel (304 or 316) is available as an option for corrosive environments.
Q7: How does the valve perform in cold temperatures?
A: Standard seals are NBR rated for -20°C. For extreme cold, we can supply FPM or low-temperature seals suitable down to -40°C.
Q8: Do you offer custom port sizes or different pressure ratings?
A: Yes, we can customize the valve to meet specific requirements. Please contact our sales team with your specifications.
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