Concentric butterfly valve

Type: Concentric butterfly valve
Material: A536,A126,WCB,LCB,CF8,CF8M.CF3.CF3M,CN7M,904L
Size: 1″ (DN25) – 80″ (DN2000)
Pressure:  125LB (PN6) – 150LB (PN16)
Connection type: Wafer concentric butterfly valve, Lugged concentric butterfly valve, Flanged concentric butterfly valve
Kind of drive: wrench, gear, electric actuators and pneumatic actuators
Operating temperature: -100℃ – 190℃
Working medium: water, gas, oil,concrete, Sulfuric acid and hydrochloric acid

Standard

• Design Standard: API 609, MSS SP-67, MSS SP-68, BS 5155
• Face to Face: API 609, ASME B16.10, BS 5155, EN1092
• End Connection: DIN PN10/16/25, ANSI B16.1, BS4504
• Inspection and Test: API 598

The structural feature of concentric butterfly valve is that the valve stem axis, butterfly plate center and body center are in the same position. The utility model has the advantages of simple structure and convenient manufacture. Common rubber lined butterfly valves belong to this category. The disadvantage is that the butterfly plate and valve seat are always in the state of extrusion and scraping, large resistance distance and fast wear. In order to overcome extrusion, scraping and ensure sealing performance, the valve seat is basically made of elastic materials such as rubber or polytetrafluoroethylene, but its use is limited by temperature. This is why people traditionally think that the butterfly valve is not resistant to high temperature.

Specifications of cconcentric butterfly valve

• No.	Part Name
  1	BODY
  2	DISC
  3	SEAT
  4	BACK RING
  5	BUSH
  6	UPPER SHAFT
  7	LOWER SHAFT
  8	GLAND BUSH
  9	PACKING GLAND
  10	GLAND BOLT
  11	THRUST PLATE
  12	END COVER O-RING
  13	END COVER
  14	SPRING WASHER
  15	HEX BOLT_END COVER
  16	DISC PIN
  17	DISC PIN O-RING
  18	DISC PIN WASHER
  19	DISC PIN HEX NUT
  20	BRACKET HEX BOLT
  21	BRACKET HEX NUT
  22	KEY

Drawing Of Concentric Butterfly Valves