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China Suppliers Factory Lever Operated Lug Type Butterfly Valve API609 PN16 Cast Iron DN25-DN300
★ Features
- Achieves bubble-tight sealing at the full rated pressure.
- Only two valve components—the seat and the disc—come into contact with the flowing medium.
- Engineered for optimal performance in applications involving abrasive or erosive media.
- Features a replaceable cartridge seat. The seat consists of a reinforced backing ring with the elastomer seat material vulcanized onto it. When the valve is installed between pipe flanges, this stable seat remains resistant to deformation or displacement. The cartridge construction also prevents issues such as stretching or bending of the elastomer in front of the moving disc during valve cycling.
- Offers a wide range of material combinations.
- Equipped with a standardized actuator flange to simplify operator interchangeability.
- A top bushing absorbs side thrust loads.
- Hub sealing is achieved through preloaded contact between the flattened seat surface and the disc hub area, ensuring positive sealing at any disc position.
- The one-piece wafer-thin disc and stem design minimizes flow obstruction.
- The seat can be replaced in the field, isolating the body and stem from the flow path.
- Molded-in O-rings provide flange sealing, eliminating the need for separate gaskets.
- Universal mounting flange: The integrally cast actuator flange conforms to ISO 5211 standard dimensions, enabling compatibility with a variety of operators—including 10-position handle kits, gear operators, electric actuators, and pneumatic actuators.
⚙ Materials Of Main Parts
| ITEM | PART NAME | MATERIAL |
|---|---|---|
| 1 | Body Material | Cast iron / Ductile iron / CF8 / CF8M / WCB / Duplex / Al-Bronze / Aluminium Etc. |
| 2 | Seat Material | EPDM / NBR / Buna / Viton / PTFE / Hypalon / Silicone / Neoprene Etc. |
| 3 | Stem Material | 45# / SS420 / SS410 / SS416 / SS316 / SS304 / Duplex stainless steel Etc. |
| 4 | Disc Material | DI+Ni, CF8, CF8M, CF3M, Duplex SS, Al-Bronze, DI+Nylon, DI+PTFE, DI Epoxy Etc. |
| 5 | Hand Lever | Malleable iron / Stamping steel / Aluminum / Stainless Steel |
| 6 | Bushing | PTFE / Bronze |
| 7 | O Ring | NBR / EPDM / VITON |
📜 Valve Standard
| Category | Details |
|---|---|
| Type | Lugged |
| Face to Face | API609, EN593, EN558-1 Series 20, DIN3202 K1, ISO5752 |
| Flange Drilling | EN1092 PN6 / PN10 / PN16 / JIS 5K / 10K / ANSI150 / AS Table D/E / SANS |
| Mounting Flange | ISO5211 |
| Pressure Rating | PN10, PN16, 150PSI, 200PSI, Class 150 |
| Application | HVAC, Water Supply & Sewage, Food & Beverage, Chemical/Petrochemical Processing, Power and Utilities, Paper and Pulp, Marine |
📏 Dimensions (mm)
🔍 More Details
Tianjin Guoji Valve Co., Ltd. is an export-oriented valve manufacturer with 15,332 square meter factory area, which has strong capability of R&D, Manufacture, Trading and Service. Now our company has passed the Lloyd's Register (LR) ISO9001: 2015 quality management system certification (ISO Approval number: ISO 9001 – 00033059) and CE/PED certification (EU Certificate Of Conformity). (Certificate No: 0343/PED/SHA/BJG00001668/A).
TGV's products covered Butterfly valves, Check valves, Strainers, Gate valves, Ball valves, Globe valves, Expansion joints, Flanges and Fittings with pressure range from 0.5 to 6.4 MPa, size from DN15 to DN3000. The products also have been widely exported to more than 30 countries and regions.
We aim at deliver only quality valves with professional services, we see quality and service as life and always take our reputation and promises seriously.
❓ Frequently Asked Questions
Q What is a lug-type butterfly valve and how does it differ from a wafer-type?
A lug-type butterfly valve features threaded inserts (lugs) around the valve body, allowing it to be bolted directly to a single flange on either side. This enables dead-end service — the pipeline can be disconnected on one side while the valve remains in place. A wafer-type valve, by contrast, is sandwiched between two flanges and relies on through-bolts for clamping, making it unsuitable for dead-end service.
Q What seat materials are available, and how do I choose the right one?
Available seat materials include EPDM, NBR (Buna), Viton, PTFE, Hypalon, Silicone, and Neoprene. The selection depends on the media and operating temperature: EPDM is ideal for water and mild chemicals; NBR suits petroleum-based fluids; Viton handles aggressive chemicals and higher temperatures; PTFE is recommended for corrosive or high-purity applications. Please consult our technical team for media-specific recommendations.
Q What pressure ratings does this butterfly valve support?
This lug butterfly valve supports pressure ratings of PN10, PN16, 150 PSI, 200 PSI, and ANSI Class 150. It complies with international standards including API609, EN593, EN558-1 Series 20, DIN3202 K1, and ISO5752, ensuring compatibility with a wide range of global piping systems.
Q Can the seat be replaced without removing the valve from the pipeline?
Yes. The replaceable cartridge seat design allows field replacement without removing the valve body from the pipeline. The seat isolates the body and stem from the flow path during replacement, reducing maintenance downtime and overall lifecycle costs significantly.
Q What actuator types are compatible with this valve?
The valve features an integrally cast actuator flange that conforms to ISO 5211 standard dimensions. This universal mounting interface ensures compatibility with a wide range of operators, including 10-position handle kits, gear operators, electric actuators, and pneumatic actuators, making it easy to automate or upgrade without modification.
Q What industries and applications is this valve suitable for?
This lug butterfly valve is widely used across HVAC systems, water supply and sewage treatment, food and beverage processing, chemical and petrochemical plants, power generation and utilities, paper and pulp industries, and marine applications. Its wide range of body, disc, and seat material options makes it adaptable to demanding and corrosive environments.