China Ductile Iron SS304 Disc Lug Type Butterfly Valves Manufacturers, Exporters
Product Description
It is easy to control the torque value within an appropriate range. It's easy to use a two-section stem without a pin connection. The structure is simple and compact, and the disassembly is convenient.
Novel, reasonable design, light weight, fast opening and closing.
The operating torque is small, the operation is convenient, labor-saving and proficient.
Can be installed in any position, convenient.
The seals can be replaced, the sealing performance is reliable, and the two-way seal has zero leakage.
The sealing material has the characteristics of aging resistance, corrosion resistance and long service life.
Simple structure, good interchangeability and low price.
The lifting lug butterfly valve is also widely used in: steam, air, gas, ammonia, oil, water, brine, alkali, seawater, nitric acid, hydrochloric acid, sulfuric acid, phosphoric acid and other media in chemical, petrochemical, smelting, pharmaceutical, food and other industries on the pipeline as a regulating and shut-off device.
The lug butterfly valve is similar in design to a three-piece ball valve in that one end of the line can be removed without affecting the other side. This can be achieved by using threaded inserts, flanges, and two sets of lugs (bolts) that do not use nuts, since each flange has its own bolt. It is also important to note that the entire system does not need to be shut down when cleaning, inspecting, servicing or replacing lug butterfly valves (requires wafer style butterfly valves).
Technical Specifications & Material Standards
| Size & Pressure Rating & Standard | |
|---|---|
| Size | DN40-DN1600 |
| Pressure Rating | PN10, PN16, CL150, JIS 5K, JIS 10K |
| Face to Face STD | API609, BS5155, DIN3202, ISO5752 |
| Connection STD | PN6, PN10, PN16, PN25, 150LB, JIS5K, 10K, 16K, GOST33259 |
| Upper Flange STD | ISO 5211 |
| Material Specifications | |
| Body | Cast Iron(GG25), Ductile Iron(GGG40/50), Carbon Steel(WCB A216), Stainless Steel(SS304/SS316/SS304L/SS316L), Duplex Stainless Steel(2507/1.4529), Bronze, Aluminium Alloy. |
| Disc | DI+Ni, Carbon Steel(WCB A216), Stainless Steel(SS304/SS316/SS304L/SS316L), Duplex Stainless Steel(2507/1.4529), Bronze, DI/WCB/SS coated with Epoxy Painting/Nylon/EPDM/NBR/PTFE/PFA |
| Stem/Shaft | SS416, SS431, SS304, SS316, Duplex Stainless Steel, Monel |
| Seat | NBR, EPDM/REPDM, PTFE/RPTFE, Viton, Neoprene, Hypalon, Silicon, PFA |
| Bushing | PTFE, Bronze |
| O Ring | NBR, EPDM, FKM |
| Actuator | Hand Lever, Gear Box, Electric Actuator, Pneumatic Actuator |
Product Gallery
Frequently Asked Questions (FAQ)
What are the main advantages of a lug butterfly valve over a wafer type?
A lug butterfly valve features threaded inserts that allow bolts to connect directly to each flange without through-bolts. This allows downstream or upstream piping to be disconnected for maintenance without shutting down the entire piping system, a feature wafer styles cannot provide.
What media are suitable for this lifting lug butterfly valve?
It can handle a broad spectrum of fluids and gases including steam, air, industrial gas, ammonia, water, oil, brine, alkali, seawater, and harsh chemical acids such as nitric, hydrochloric, sulfuric, and phosphoric acid.
Can the butterfly valve be mounted in any orientation?
Yes, the lightweight, compact structure and reliable two-way zero leakage seal allow it to be installed conveniently in any position along the pipeline system.
What actuation options are compatible with these valves?
Because the upper flange complies with the ISO 5211 standard, it easily accommodates manual hand levers, gearboxes, pneumatic actuators, and electric actuators depending on application needs.
How does the seal replacement work?
The valve features a simple, pinless, two-section stem design with modular components, allowing quick and easy disassembly to replace worn seats or O-rings on-site without complex tools.
