01
China Suppliers Factory No Pin Ductile Iron Lug Butterfly Valve DN40-DN300
Features
✓
Bubble-tight shut-off at full pressure rating
✓
The seat and the disc are the only two valve parts in contact with the medium.
✓
Superior design for abrasive and erosive media.
✓
Replaceable cartridge seat — The replaceable seat consists of a reinforced back-up ring, on which the elastomer seat material is vulcanized. When mounting the valve between the pipe flanges this stable seat cannot be deformed or displaced. The cartridge design also prevents deformation when the valve is cycled, such as stretching and bending of the elastomer in front of the moving disc.
✓
Large number of material combinations available.
✓
Standardized actuator flange for easy operator interchangeability.
✓
Top bushing absorbs side thrust loads.
✓
Hub seal provided by preloaded contact between flatted seat surface and disc hub area for positive sealing at all disc positions.
✓
One-piece wafer thin disc stem gives the very minimum obstruction to flow.
✓
Field replaceable seat isolates the body and stem from the flow.
✓
Molded-in O-rings provides flange sealing and eliminates need for gaskets.
✓
Universal Mounting Flange — The cast-in actuator flange is universally designed in accordance with ISO 5211 standard dimensions. The mounting flange can accommodate all types of operators such as: 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)
Company Strength
●
With over 15 years of expertise, Tianjin Guoji Valve Co., Ltd. (TGV) takes pride in delivering not just products, but complete, high-performance flow control solutions tailored to your project needs. Our extensive portfolio—from ball valves and butterfly valves to expansion joints, strainers, actuators, and pipe fittings—ensures that we serve as your one-stop source for industries ranging from oil and gas to waterworks and HVAC.
● We understand that reliability, precision, and on-time delivery are critical to your operations. That's why every TGV product is backed by strict quality control, competitive pricing, and a responsive service team ready to support your specifications. Whether you are equipping a large-scale petrochemical plant or optimizing a municipal water system, we are here to provide engineered solutions that perform.
● Send us your inquiry today—share your detailed requirements, and let our technical experts offer you customized recommendations, quick turnaround, and a reliable partnership built on quality and trust.
● We understand that reliability, precision, and on-time delivery are critical to your operations. That's why every TGV product is backed by strict quality control, competitive pricing, and a responsive service team ready to support your specifications. Whether you are equipping a large-scale petrochemical plant or optimizing a municipal water system, we are here to provide engineered solutions that perform.
● Send us your inquiry today—share your detailed requirements, and let our technical experts offer you customized recommendations, quick turnaround, and a reliable partnership built on quality and trust.
Frequently Asked Questions (FAQ)
Q
What types of media is this lug butterfly valve suitable for?
This lug butterfly valve features a superior design specifically engineered for abrasive and erosive media. It is widely used in HVAC, water supply & sewage, food & beverage, chemical/petrochemical processing, power and utilities, paper and pulp, and marine applications.
Q
What is the pressure rating of this butterfly valve?
The valve is rated at PN10, PN16, 150PSI, 200PSI, and Class 150, making it suitable for a wide range of industrial and commercial pipeline systems.
Q
Can the seat be replaced without removing the valve body from the pipeline?
Yes. The valve features a field-replaceable cartridge seat design. The seat isolates the body and stem from the flow, and can be replaced on-site without disassembling the entire pipeline, significantly reducing maintenance downtime.
Q
What actuator types are compatible with this valve?
The cast-in actuator flange is designed in accordance with ISO 5211 standard dimensions, making it compatible with all types of operators including 10-position handle kits, gear operators, electric actuators, and pneumatic actuators.
Q
What material options are available for the disc and seat?
A large number of material combinations are available. Disc materials include DI+Ni, CF8, CF8M, CF3M, Duplex SS, Al-Bronze, DI+Nylon, DI+PTFE, and DI Epoxy. Seat materials include EPDM, NBR, Buna, Viton, PTFE, Hypalon, Silicone, and Neoprene, allowing customization for different media and operating conditions.
Q
Which international standards does this valve comply with?
The valve complies with multiple international standards including API609, EN593, EN558-1 Series 20, DIN3202 K1, ISO5752 for face-to-face dimensions, and EN1092 PN6/PN10/PN16, JIS 5K/10K, ANSI150, AS Table D/E, and SANS for flange drilling. The mounting flange conforms to ISO5211.