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Centric Butterfly Valves

Centric Valves

FEATURES :

Leak Tightness at Line Stream, Shaft Passages and Atmosphere

A perfect zero leakage seal at bi-direction is obtained by the compression of the inner between the valve body and the edge of the disc. A perfect zero leakage seal is provided by means of flatted liner area around both up and down shaft passages and the spherically machined disc. Since the seat stem hole is smaller than the stem diameter, there is a compression fit forming a secondary seal. The seal insures that no fluid will leak to atmosphere.

SPECIFICATION :

Standard
  • ISO 5752 - BS 5155 - MSS SP 67 - API 609
Product Range
  • 40mm up to 1000mm (1 ½″ ~ 40″)
Pressure Range
  • Designed for maximum working pressure of 16bar (240psi)
Flange Connections

The shape of valve body has been designed to allow flange bolt alignment onto the following standards. Wafer type valve has been successfully developed to fit multi-functional application onto either connection standard in the same configuration, mainly:

  • ISO PN 6, 10, 16, 20
  • ANSI B 16.1 CL.
  • BS 4504 PN6, PN10, PN16
  • AS 2109 Table D and E
  • MSS SP 44 CL. 150
  • ANSI B 16.5 CL. 150
  • BS 10 Table D and E
  • JIS B 2210 5K, 10K, 16K, and 20K
Operating
  • Hand lever with notch plate
  • Manual worm gear
  • With locking device
  • Electric/Pneumatic actuator
  • Hydraulic actuator
  • Chainwheel gear box
Testing
  • API598
  • MSS SP 61, ANSI B 16.104

BODY :

Material ASTM Specification
Cast Iron ASTM A 126 Cl B
Ductile Iron ASTM A 536 Gr 65-45-12
Carbon Steel ASTM A 216 Gr WCB
Stainless Steel ASTM A 351 Gr CF8-CF8M
Bronze ASTM B 62

DISC :

Material ASTM Specification
Ductile Iron ASTM A 536 Gr 65-45-12
Stainless steel ASTM A 351 Gr CF8-CF8M
Aluminium Bronze ASTM B 148 CI C 95500
Coated EPDM, VITON, BUNA-N, etc

STEM :

Material ASTM Specification
Stainless Steel ASTM A 276 304
Stainless steel ASTM A 276 316
Stainless Steel ASTM A 276 410
Stainless Steel 17-4PH ASTM A 564 TYPE 630
K-Monel ASTM B 164

SEAT :

Material ASTM Specification
Elastomer Working Temperautre
EPDM 0° C ~ + 80° C
NBR 0° C ~ + 70° C
VITON -20° C ~ + 150° C
SILICON -20° C ~ + 120° C
NEOPRENE -10° C ~ + 70° C

PACKING :

Material ASTM Specification
EPDM -
NBR -
VITON -

GLAND :

Material ASTM Specification
PP -

WAFER TYPE :

Valve Dimensions
Butterfly Valve With Lever Operated
SIZE A B C D E F G
Inch mm
1 1/2" 40 40 96 65 28 65 180 15
2" 50 43 103 70 28 65 180 15
2 1/2" 65 46 110 76 48 65 180 15
3" 80 46 118 85 67 65 215 15
4" 100 52 148 102 88 65 215 15
5" 125 56 164 145 114 65 265 15
6" 150 56 176 130 142 65 265 15
8" 200 60 230 156 194 75 325 15
Butterfly Valve WithWarm Gear Operated
SIZE A B C D E F G
Inch mm
1004"521571008818020015
1255"5616411511418020015
1506"5618113314224025015
2008"6023015619428535015
25010"6826619624328535018
30012"7830023029228535018
35014"9232027233030035022
40016"10238530237530550022
45018"11440532542530550024
50020"12746540547037060026
60024"15454046057035060026

* Dimensions and other engineering data are subject to change without notice

* Dimensions are as per standard API 609

FULL LUGGED TYPE :

Valve Dimensions
Butterfly Valve Lug Type With Lever Operated
SIZE Category 'A' Category 'B' D E F G Flange Mounting (ISO 5211)
Inch mm Face To Face Face To Face
150# 300#
2" 50 43 - - 28 65 180 15 F05
2 1/2" 65 46 - - 48 65 180 15 F05
3" 80 46 48 48 67 65 215 15 F05
4" 100 52 54 54 88 65 215 15 F05
5" 125 56 57 59 114 65 265 15 F05
6" 150 56 57 59 142 65 265 15 F05
8" 200 60 64 73 194 75 325 15 F07
Butterfly Valve Lug Type With Warm Gear Operated
SIZE Category 'A' Category 'B' D E F G Flange Mounting (ISO 5211)
Inch mm Face To Face Face To Face
150# 300#
2"5043--2818020015F07
2 1/2"6546--4818020015F07
3"804648486718020015F07
1004"5254548818020015F07
1255"56575911418020015F07
1506"56647319428535015F07
2008"68718324328535018F10
25010"78819229228535018F10
30012"929211733030035022F12
35014"10210213337530550022F14
40016"11411414942530550024F14
45018"12712715947037060026F16
60024"15415418157035060026F16

* Dimensions and other engineering data are subject to change without notice

* Dimensions are as per standard API 609

DOUBLE FLANGED TYPE :

Valve Dimensions
Butterfly Valve Double Flange Type With Lever Operated
SIZE A B D E F G Flange Mounting (ISO 5211)
Inch mm
2"50108125856518015F05
2 1/2"65112135956518015F05
3"801141551026521515F05
4"1001271601126521515F05
5"1251401801346526515F05
6"1501402101476526515F05
8"2001522501757532515F07
Butterfly Valve Double FlangeType With Warm Gear Operated
SIZE A B D E F G Flange Mounting (ISO 5211)
Inch mm
2008"15225017528535015F10
25010"16528520828535018F10
30012"17831022728535018F10
35014"19034027530035022F12
40016"21637630830550022F14
45018"22239037330550024F14
50020"22942540837060026F16
60024"26750046435060026F16

* Dimensions and other engineering data are subject to change without notice

* Dimensions are as per standard API 609

TEFLON COVERED ONE-PIECE STAINLESS STEEL DISE AND SHAFT :

The seat configuration of the resiliency of Elastomer back-up ring and the chemical resistance of a Teflon® makes valve with more suitable for application such as toxic and corrosive media where Elastomer are unsuitable.

One-piece disc/shaft provide the minimum obstruction to fluid flow since shaft-attachment obstruction is eliminated. This results in excellent flow characteristics and makes a valve suited for the processing industries because fluid contact is limited to the seat and disc only.

Application
  • Chemicals, acids, corrosive products
General Characteristics
  • 4Two piece-body
  • Bi-directional
  • Centered butterfly
  • 1 piece stem and butterfly
Construction
  • Body cast steel / stainless steel
  • Stainless steel butterfly PTFE lined
  • PTFE sleeve with rubber backup pad
Coating
  • Painting: oven baked epoxy powder coating. 150#
Working Conditions
  • 5.5 Bar Pressure
Hydraulic Tests
  • 1.1 times the maximum working pressure
Connection
  • Between flanges ISO PN 10/16, ANSI B 16.5, 150#
Handling Possibilities
  • Lever
  • Gear box with opening indicator
  • Single or double effect pneumatic actuator
  • Electric motors 220/380V mono/tri

ONE-PIECE STAINLESS STEEL DISE / SHAFT :

Cut away PFA coated Disc -Stem
  • Stainless steel with finish allows proper secondary seal and bearing conditions at seat hole.
  • Extended covering from primary seal through secondary seal into seat hole area assures stem isolation.
  • Complete encapsulation affords complete isolation of steel disc.
  • PFA- covered disc suitable not only for chemically resistant but for handling abrasives in the processing industries
Material standard
  • Body : Cast Iron - Aluminium - Ductile Iron
  • Disc : Hard rubber lined steel - SS304 - 316
  • Seat : All kinds of rubber

TWO PIECE TEFLON LINED :