Eccentric Butterfly Valves

SIERRA model 7500 is an eccentric disc seated – double eccentric – butterfly valves. Valve body and discs are designed to provide minimal flow resistance. Precise tightness is ensured on both sides. The double eccentric effect enables the rubber sealing ring to separate easily from the body seat, results in a cam like motion to lift the seat from the seal during the first degree of opening, there by reduces the opening resistance, wear and improves the service life of the valve seat. The sealing ring can be easily changed in pipeline without disassembling the disc. 7500 BFV model is suitable for high-pressure waterworks applications, it is an excellent valve for isolation purposes, and it might also be used for throttling purposes under certain conditions

Category:

SIERRA model 7500 is an eccentric disc seated – double eccentric – butterfly valves. Valve body and discs are designed to provide minimal flow resistance. Precise tightness is ensured on both sides. The double eccentric effect enables the rubber sealing ring to separate easily from the body seat, results in a cam like motion to lift the seat from the seal during the first degree of opening, there by reduces the opening resistance, wear and improves the service life of the valve seat. The sealing ring can be easily changed in pipeline without disassembling the disc. 7500 BFV model is suitable for high-pressure waterworks applications, it is an excellent valve for isolation purposes, and it might also be used for throttling purposes under certain conditions

Overview

Eccentric Butterfly Valve Product Overview
Product Range DN100 – DN2600
Pressure Rating PN10, PN16 and 25
Temperature Range -20°C TO +70°C
Flange Dimensions EN1092-2 (DIN2501)
Hydrostatic Testing EN12266, ISO5208
Type Testing EN1074-1&2
Actuation Manual with GB, and/or electrically actuated
Certificates Manufactured under a certified ISO 9001 quality system
Applications Municipal water and irrigation pipeline mains and distribution networks, pumping stations and intakes, ground reservoirs and elevated tanks, water treatment plants, primary and secondary cooling for power stations

Features

Main Product Features
  • Double eccentric design prevents high friction between the disc rubber seal and body seat in during the first few degrees of opening and closing of the valve. The double eccentric design hence prolongs the life of the rubber seal.
  • Stainless steel seat design, is welded and precisely machined inside the valve body hence: Providing a lower coefficient of friction during operation, high corrosion, and wear resistance
  • Rubber seal & retainer mechanism (pressure activated rubber seal molded in one piece -no glued joint- is mechanically attached to a highly secured retainer sealing mechanism
  • Tight closure in both direction at valve rating pressures
  • Optimized disc design which provides minimal flow resistance
  • Compact design which requires small space
  • Flexible design allowing maintenance and replacement of disc seal in-line

Specifications

Double Eccentric Butterfly Valves – AR
Double Eccentric Butterfly Valves – EN

Materials

Double eccentric BFV material of construction
Butterfly valves material of construction

TDS

BFV7500 with GB-series13-PN10  
BFV7500 with GB-series13-PN16  
BFV7500 with GB-series20-PN10  
BFV7500 with GB-series20-PN16  
BFV7500 with EA-series13-PN10  
BFV7500 with EA-series13-PN16   
BFV7500 with EA-series20-PN10    
BFV7500 with EA-series20-PN16  

Dimensions

 

 

DN

 Double Eccentric Butterfly Valves Dimensions
BFV Valves Manually With Gearbox BFV Valves With Electric Actuator
PN10-16 PN10 PN16 PN10-16 PN10 PN16
2D PDF CAD 3D PDF STEP STEP 2D PDF CAD 3D PDF STEP STEP
100 2PBF100 CBF100 3PBF100 STBF100 STBF100 2PBF100 CBF100 3PBF100 STBF100 STBF100
150 2PBF150 CBF150 3PBF150 STBF150 STBF150 2PBF150 CBF150 3PBF150 STBF150