Butterfly Valve
   A quarter-turn valve which has a circular disk as its closing element. The standard design has the valve stem running through the
disk, giving a symmetrical appearance. Later designs off-set the stem, so that the disk "cams" into the valve seat. Advantages include less
wear and tear on the disk and seats, and tighter shut-off capacities. Many design types are available including inexpensive? Teflon or resilient seats for use in water(treatment) plants, etc. More expensive metal seats can be used where high temperatures or aggressive chemicals are encountered. So-called "High Temperature" butterfly valves offer zero leakage designs and have been applied in both the chemicals and hydrocarbon processing sectors.

Standards
Flange Butterfly Valves: MSS SP-67
Water Butterfly Valves: MSS SP-68 or API 609
Face to Face Dimensions: ANSI B16.10 MSS SP-67 and MSS SP-68 or 609
Test: API598
End flange dimensions
NPS 1 1/2-24; ANSI B 16.5
NPS 30-72 MSS SP-44 or API 605
Type of construction
Flange Butterfly Valves (Hard face and soft face)
Wafer Butterfly Valves (Hard face and soft face)
Type of connection
R F and RTJ flange ends to ANSI B 16.5 or API 605 and MSS SP-44 standard.
Type of Operation
Lever
Worm Gear actuator, electric actuator, Pneumatic actuator.
Actuator Dimensions to ISO 5211 standard.

Standards
Flange Butterfly Valves: MSS SP-67
Water Butterfly Valves: MSS SP-68 or API 609
Face to Face Dimensions: ANSI B16.10 MSS SP-67 and MSS SP-68 or 609
Test: API598
End Flange Dimensions
NPS 1 1/2-24; ANSI B 16.5
NPS 30-72 MSS SP-44 or API 605
Type of construction
Flange Butterfly Valves (Hard face and soft face)
Wafer Butterfly Valves (Hard face and soft face)
Type of Connection
R F and RTJ flange ends to ANSI B 16.5 or API 605 and MSS SP-44 standard.
Type of Operation
Lever
Worm Gear actuator, Electric actuator, Pneumatic actuator.
Actuator Dimensions to ISO 5211 standard.

Standards
Flange Butterfly Valves: MSS SP-67
Water Butterfly Valves: MSS SP-68 or API 609
Face to face dimensions: ANSI B16.10 MSS SP-67 and MSS SP-68 or 609
Test: API598
End Flange Dimensions
NPS 1 1/2-24; ANSI B 16.5
NPS 30-72 MSS SP-44 or API 605
Type of Construction
Flange Butterfly Valves (Hard face and soft face)
Wafer Butterfly Valves (Hard face and soft face)
Type of Connection
R F and RTJ flange ends to ANSI B 16.5 or API 605 and MSS SP-44 standard.
Type of Operation
Lever
Worm Gear actuator, electric actuator, Pneumatic actuator.
Actuator dimensions to ISO 5211 standard.

Product Name: Butterfly Valve with Fluorine Lining
Product Model:D371F46（F3）
Pressure Grade: 1.0MPa~1.6MPa
Product Specification: DN50~1000mm
Product Material: Carbon Steel, Cast Steel, Fluorine Lining
Temperature: ≤120oC
Mediums: Corrosive Mediums

Detailed Product Description
Specifications:
1) Size: DN50 (2") ~ DN600 (24")
2) Pressure: PN10, PN16, 125LB
3) Material:
a) Body: ductile iron, cast iron, stainless steel, carbon steel
b) Disc: plated ductile iron, aluminum bronze, stainless steel
c) Stem: stainless steel
d) Seat: NBR, EPDM, FKM, and CR
4) Standards:
a) Valve design to: API609
b) Valve test to: API598, GB13927
c) Face to face: API609
d) Flange drilled is according to: GB/T17241, ANSI B16.42, ANSIB 16.1, and EN1092-2

Features:
1) Small in size and light in weight; easy in installation and maintenance; can be mounted wherever needed
2) Small torque of operate, energy saving
3) Flow curve tending to straight line. Excellent regulation performance
4) Long service life. Standing the test of tens of thousands opening/closing operation
5) Perfect sealing without leakage under the pressure test
6) Wide selection of materials, applicable for various mediums

Detailed Product Description
Features:
1) Standards: API 609, MSS-SP-68, ANSI B16.34
a) Basic design: API 609
b) Test: API 598, BS 6755 MSS-SP-25
2) Size: 2" - 36"
3) Rating: 150lbs-1500lbs
4) Body materials: cast iron, ductile iron, cast steel, stainless steel
5) Operation: hand wheel, gear, motor, pneumatic operator
6) End connection: wafer, lug, double flange
7) Design features:
a) Concentric design
b) 2pc shaft low torque design
c) Bi-directional service
d) Self cleaning
e) Blow-out proof shaft
f) ISO5211 top flange