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Help CenterAlloy Steel Plunger Valve, Natural Gas, 6000PSI, 8" Full Bore, Self-Lubricating Stem, 1 Year Warranty
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Shanghai Zhibang Valve Manufacture Co., Ltd. has been a trusted manufacturer of high-performance industrial valves since 2016, exporting over US$1 million annually to global markets including North America, Europe, and Southeast Asia. Our Alloy Steel Plunger Valve is specifically engineered for demanding natural gas applications, delivering reliable sealing and precise flow control under extreme pressures up to 6000 PSI. With a 8-inch full bore design and a self-lubricating stem, this valve minimizes maintenance downtime while maximizing flow efficiency – a critical advantage for oil and gas operations.
Crafted from premium alloy steel, this plunger valve offers exceptional resistance to corrosion, erosion, and high-temperature environments. The full bore configuration ensures minimal pressure drop and unrestricted flow, making it ideal for pipeline pigging and high-viscosity fluids. The self-lubricating stem reduces friction, extends service life, and eliminates the need for external lubrication, lowering total cost of ownership. Each valve undergoes rigorous testing to meet ISO9001 quality standards, backed by a 1-year warranty for your peace of mind.
Key Technical Specifications
| Parameter | Value |
| Material | Alloy Steel (ASTM A216 WCB or equivalent) |
| Pressure Rating | 6000 PSI (Class 2500) |
| Size | 8 inch (DN200) |
| Bore Type | Full Bore (no reduction) |
| Stem Type | Self-Lubricating (PTFE or graphite-based) |
| Connection | Flanged (RF or RTJ, customizable) |
| Operating Temperature | -20°C to 150°C (wider range available upon request) |
| Media | Natural Gas, Oil, Water, Steam (non-corrosive) |
Product Features & Benefits
- Alloy Steel Construction – Withstands high pressure, thermal cycling, and corrosive media, ensuring long-term durability in harsh environments.
- 6000 PSI Pressure Rating – Suitable for high-pressure natural gas pipelines, hydraulic systems, and critical process applications.
- 8-inch Full Bore Design – Eliminates flow restrictions, allowing pigging operations and reducing energy loss compared to reduced-port valves.
- Self-Lubricating Stem – Reduces operating torque, prevents galling, and extends maintenance intervals. No external grease required.
- ISO9001 Certified – Manufactured under strict quality control, with traceable materials and hydrostatic testing for every unit.
- 1-Year Warranty – Covers defects in materials and workmanship, reflecting our confidence in product reliability.
- Customizable Options – Available with different flanges (ANSI, DIN, JIS), trim materials, and actuator mountings to suit specific project requirements.
Our plunger valve features a unique sealing mechanism that provides bubble-tight shut-off even after thousands of cycles. The stem design incorporates a self-lubricating bushing that reduces friction by up to 40%, significantly lowering actuation force. This is particularly beneficial for automated systems where consistent performance is critical. Additionally, the full bore body minimizes turbulence, which is essential for natural gas metering stations and custody transfer applications.
Quality Assurance & Trust
Shanghai Zhibang Valve Manufacture Co., Ltd. has been serving clients across 13 major global markets since 2016, with an annual export value of US$1–1.5 million. Our valves are shipped from Shanghai, Guangzhou, Hong Kong, and Beijing ports, ensuring fast and flexible logistics. With ISO9001 certification, we maintain rigorous quality control from raw material procurement to final assembly. Each 8-inch 6000 PSI plunger valve is hydrostatically tested at 1.5x rated pressure and seat leakage tested to Class VI standards. We also offer optional third-party inspection to meet your specific requirements. Choose Zhibang for reliable, high-performance valves that keep your operations running smoothly.
Frequently Asked Questions
Q1: Can this valve be used for sour gas service (H2S)?
A1: The standard alloy steel material is suitable for natural gas with low H2S content. For sour service, we recommend NACE MR0175-compliant trim options. Please contact us with your specific gas composition for a customized solution.
Q2: What is the maximum working temperature?
A2: The standard temperature range is -20°C to 150°C. For higher temperatures up to 300°C, alternative seat and seal materials (e.g., PEEK, graphite) are available upon request.
Q3: Does the self-lubricating stem require any maintenance?
A3: No external lubrication is needed. The stem is impregnated with a solid lubricant that lasts the valve's lifetime under normal operating conditions. Periodic inspection of the stem packing is recommended.
Q4: What flange standards are available?
A4: Standard flanges are ANSI 150-2500 RF. We also offer DIN, JIS, and GOST flanges on request. Please specify your requirement when ordering.
Q5: Is the valve suitable for bidirectional flow?
A5: Yes, the plunger valve design provides bidirectional sealing capability, making it ideal for applications where flow direction may reverse.
Q6: What is the delivery time for this valve?
A6: Standard delivery is 30–45 days after order confirmation. For urgent requirements, expedited production (15–20 days) is available at a surcharge. Please contact our sales team for current lead times.
Q7: Do you provide pressure test certificates?
A7: Yes, each valve comes with a hydrostatic test certificate and material traceability report. Third-party inspection certificates (e.g., Lloyds, BV) can be arranged at additional cost.
Q8: Can I get a sample for testing before bulk order?
A8: Yes, sample orders are welcome. We provide a limited number of units for qualification testing. Please contact us to discuss sample availability and shipping terms.
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