Butterfly Valve

Briflon® High Performance, Tight Shut Off, Bi-directional, Wafer/Lug Style, Slim Seal, Integral Stem & Centric Disc Design, Lever/Gear Operated Type Cast Ductile Iron Fully Lined Butterfly Valve suitable for corrosion & temperature resistance. Confirming to mfg. std. of BS 5155 /API 609 and testing std. of BS 6755

A self-adjusting stem sealing system ensure zero leakage to the atmosphere. Silicon Seat back up with PTFE / PFA Liner and spherical disc design provides consistent tight shut off.

This Valve can also be supplied with stainless steel body for clean room applications as well as corrosive services. The disc can be supplied in Unlined Stainless Steel , Monel , Hastalloyor other exotic materials also. Alternatively Valve can be supplied with Gearbox / Pneumatic / Electric Actuator.

  • Cross-Section Drawing
  • Design Features & Benefits
  • Dimension (MM) & Test Pressure
  • Operating Characteristic
  • Lining Specification
  • Optional Accessories
  • Advantage
SR.NO. PART NAME MATERIAL
1 BODY ASTM A395 DUCTILE IRON
2 BODY LINER PFA/FEP
3 DISC WITH INTEGRAL SHAFT C.S WITH PFA/FEP LINING
4 ELASTOMER BACKING SILICON RUBBER
5 THRUST COLLAR PTFE
6 THRUST WASHER SS 304
7 GLAND BUSH PTFE
8 DISC SPRING SPRING STEEL
9 PLAIN WASHER M.S
10 LEVER M.S

FEP/PFA Body & Disc Liner

The high quality most advanced Fluoropolymer liner on the Butterfly Valve is melt processible which avoids porosity problems. The non sticky properties of the liner ensure high performance of the valve under highly corrosive chemicals in conjunction with high pressure and temperature.

Locked in Disc Liner

The melt processible Fluoropolymer of this Butterfly Valve is securely locked in to cast hole of disc, which helps to prevent liner to collapse in vacuum condition and blow out in high pressure conditions regardless of high temperature.

Live Loaded Top Sealing

Live loaded disc spring washers provides constant uniform packing pressure and requires no manual setting from the top in running condition.

Tight Shut Off

A silicon backing strip is provided inside deep machined body groove for the liner to resist against the disc edge which creates tight shut off.

Briflon® Butterfly Valves with FEP/PFA are unequaled for chemical services like

  • All acids.
  • All bleach solutions
  • All phenols
  • All inorganic chlorides and sulfates
  • All solvents
  • All caustics
  • All organic chlorides and sulfates

 

Standard Design

Briflon® fully lined Butterfly Valves are design in accordance with face to face dimension of API 609 specification and suitable to mount between two flanges of ANSI B 16.5 flanges which permits this valves to replace with any standard Butterfly Valve without altering existing piping.

DIMENSION(MM)-150#

SIZE (NB) F TO F (±3.0)
50 43
65 46
80 46
100 52
150 56
200 60
250 68
300 78
350 78

TEST PRESSURE

BODY (HYDRO) 20 Kg/cm2g (Before Lining)
SEAT (HYDRO) 10 Kg/cm2g (Before Lining)
SEAT (PNEUMATIC) 07 Kg/cm2g
Size 50 65 80 100 150 200 250 300
Torque(NM) 30 30 40 50 100 160 250 350
Cv 225 295 325 570 1670 2575 3950 5950
TYPE PFA/FEP
SPARK TEST 10 K.V D.C
THICKNESS 3.0 MM OVER ALL WETTED PARTS