China Pneumatic Soft Seal Lug Butterfly Valve OEM Factory, Factories

 Lug type butterfly valve with Pneumatic actuator is one of the most common butterfly valve. The pneumatic lug type butterfly valve is driven by the air source. Pneumatic actuator are divided into single acting and double acting. This kind of valves are widely used in water, steam and wastewater treatment. in different standard, such as ANSI, DIN, JIS, GB.

Product Description

Key Features & Characteristics
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.
Applications & System Design Advantages

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).

Product Showcase
Technical Specifications & Material Data
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
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
Valve Dimensional Diagram
Frequently Asked Questions (FAQ)
What are the main installation advantages of a lug butterfly valve?
Lug butterfly valves allow one side of the piping system to be disconnected or serviced without depressurizing or shutting down the entire system, thanks to independent threaded connections for each flange.
What media types can these valves handle?
They are compatible with steam, air, gas, ammonia, oil, water, brine, seawater, as well as aggressive chemicals including nitric, hydrochloric, sulfuric, and phosphoric acids.
What size and pressure ratings are available?
The valves cover nominal dimensions from DN40 to DN1600, supporting standard pressure classes like PN10, PN16, CL150, JIS 5K, and JIS 10K.
Can the valve achieve bi-directional zero leakage?
Yes, the replaceable high-performance sealing materials are designed to deliver reliable bidirectional sealing performance with zero leakage.
What operation and actuation options are supported?
Operation is highly versatile, supporting manual control via Hand Lever or Gear Box, as well as automated operation through Electric or Pneumatic Actuators via an ISO 5211 top flange.

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