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Help CenterGB/T3037-94 Standard 150mm Flanged Lug Butterfly Valve for Piping
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As a professional valve manufacturer with ISO9001 certified quality management, Shanghai Zhibang Valve Manufacture Co., Ltd. proudly presents our GB/T3037-94 Standard 150mm Flanged Lug Butterfly Valve. Engineered for reliable and efficient flow control in diverse industrial piping systems, this valve combines robust construction with precise operation. With years of experience serving global markets from North America to Southeast Asia, we understand the critical need for durable, leak-proof, and easy-to-maintain valves. Our 150mm lug butterfly valve is designed to meet those demands, offering a cost-effective solution for isolation and regulation applications.
This valve is constructed to deliver long-term performance in demanding environments. The flanged lug design provides a secure connection point, allowing for easy installation and removal from the pipeline without disturbing adjacent sections. This is particularly advantageous for systems requiring frequent maintenance or valve replacement. The lug pattern is drilled to standard dimensions, ensuring compatibility with a wide range of flanges.
Key Features and Technical Advantages:
- Standard Compliance: Manufactured in strict accordance with the Chinese national standard GB/T3037-94, ensuring dimensional interchangeability, pressure integrity, and performance reliability.
- Versatile Lug Design: The flanged lug body features threaded holes on both sides, enabling it to be installed as a dead-end service valve or between two flanges using through-bolts. This design offers installation flexibility.
- Robust Sealing System: Utilizes a resilient seat (available in EPDM, NBR, PTFE, etc.) that provides a bubble-tight seal against the precision-machined disc, minimizing leakage and ensuring reliable shut-off.
- Durable Disc and Stem Assembly: The disc is securely mounted on a stainless steel or coated stem, designed to withstand operational torque and prevent corrosion. The stem is sealed with multiple O-rings or packing to prevent media leakage to the atmosphere.
- Multiple Actuation Options: Available with a standard lever handle for quick manual operation, a gear operator for higher torque applications, or prepared for the mounting of pneumatic/electric actuators for automated process control.
- Corrosion Protection: Standard external coating (epoxy powder coating or paint) protects the valve body from environmental corrosion. Internal coatings or specific material selections are available for corrosive media.
Detailed Technical Specifications:
| Parameter | Specification |
| Design & Manufacturing Standard | GB/T3037-94 |
| Nominal Size (DN) | 150 mm |
| Nominal Pressure (PN) | PN10, PN16 (Other ratings available) |
| Connection Type | Flanged Lug (Drilled as per standard) |
| Body Material (Typical) | Ductile Iron (GGG40), Cast Iron (HT250) |
| Disc Material (Typical) | Stainless Steel (CF8/304), Ductile Iron with coating |
| Stem Material | Stainless Steel (2Cr13/420) |
| Seat Material (Options) | EPDM, NBR, Viton, PTFE, etc. |
| Temperature Range | -20°C to +120°C (EPDM), up to +200°C (PTFE) |
| Leakage Class | Class A (Zero Leakage) per relevant standards |
| Operation | Lever, Worm Gear, Pneumatic/Electric Actuator (Optional) |
Application Benefits for Your Business: This valve is engineered to reduce total cost of ownership. Its simple design leads to lower initial purchase costs compared to other valve types. The lug style facilitates easier and faster installation and maintenance, saving on labor time. The reliable sealing extends service intervals, and the availability of common spare parts (like seats) ensures quick repairs, minimizing downtime in your water treatment, HVAC, chemical processing, or general industrial piping systems.
Shanghai Zhibang Valve, established in 2016, has built a strong reputation by consistently delivering quality industrial valves. Our ISO9001 certification underpins our commitment to controlled manufacturing processes and product consistency. With an annual export value reaching up to US$1.5 million, we have successfully supplied reliable valve solutions across continents, from Eastern Europe to Oceania. Our strategic location with multiple shipment ports (Shanghai, Guangzhou, Hong Kong, Beijing) ensures flexible and efficient logistics for your orders. Choose our GB/T3037-94 150mm Flanged Lug Butterfly Valve for a balance of standard compliance, durable performance, and value. Contact us today to discuss your project requirements or to request a detailed quotation.
Frequently Asked Questions (FAQ):
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Q: What is the main advantage of a lug-style butterfly valve over a wafer-style?
A: A lug-style valve has threaded lugs (or holes) on the valve body. This allows it to be bolted directly to a flange at each end using separate bolts, making it suitable for end-of-line service or easier removal without taking apart the entire pipeline section. -
Q: Is this valve suitable for throttling (flow control) applications, or just for on/off service?
A> While primarily designed for reliable isolation (on/off), this resilient-seated butterfly valve can be used for moderate throttling applications. For precise flow control, especially with higher pressure drops, we recommend consulting our engineers for seat and disc material selection. -
Q: Can I order this valve with different end flanges, like ANSI 150#?
A: Yes. While the standard is GB/T3037-94, we can manufacture valves with drilling patterns to match other common standards such as ANSI, DIN, or JIS upon request. Please specify your required flange standard when inquiring. -
Q: What are the available seat material options, and how do I choose?
A> Common options include EPDM for water and mild chemicals, NBR for oils and fuels, and PTFE for aggressive chemicals and higher temperatures. The choice depends entirely on the media, temperature, and pressure in your specific application. -
Q: Is the valve fire-safe certified?
A: The standard model is not fire-safe. However, we can provide butterfly valves with fire-safe design (metal seat backup, graphite packing, etc.) that meet API 607/API 6FA or similar standards as a customizable option. -
Q: What is the lead time for an order of 50 pieces?
A: For standard configuration (DN150, PN16, lever handle, EPDM seat), our typical lead time is 15-30 days after order confirmation. This can vary based on specific material choices and current production schedule. -
Q: Do you provide technical drawings and documentation with the order?
A: Yes. We provide detailed dimensional drawings, material test reports (MTRs) for critical components upon request, and a comprehensive operation & maintenance manual with each shipment to support your installation and compliance needs. -
Q: What is your standard warranty policy?
A: We offer a standard warranty of 12 months from the date of shipment against defects in material and workmanship under normal use and service conditions as specified in our manual.
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