Loose Liner Wafer-Type Butterfly Valve cw Gear

Valve Type

Wafer Type Butterfly Valve (Center Line / Concentric Design)

Body Material

Ductile Iron (ASTM A536 Grade 65-45-12 / GGG-50)

Epoxy coated

Disc Material

Ductile Iron + Nickel Plated (Electroless Nickel Plating – ENP)

Corrosion resistant finish

Stem Material

Stainless Steel (AISI 410 / 304 / 316)

Blow-out proof design

Seat Material

Replaceable Soft Seat – EPDM / Buna-N / Viton / PTFE (Specify)

Field replaceable

Nominal Size

2″ – 24″ (DN50 – DN600)

Pressure Rating

Class 125 / Class 150 / PN10 / PN16

Design Standard

API 609 / MSS SP-67 / ISO 5752

Face-to-Face

API 609 Short Pattern / ISO 5752 Series 20

Flange Drilling

ASME B16.1 / ASME B16.5 / EN 1092-2

Inspection & Test

API 598 / ISO 5208

Top Flange

ISO 5211 (For direct actuator mounting)

Disc Design

Pinless / Staked Disc (No pins through disc)

Eliminates leakage paths

1

Body

Ductile Iron (ASTM A536 65-45-12)

Epoxy coated (Internal/External)

2

Disc

Ductile Iron + Nickel Plated (Electroless Nickel Plating)

Pinless design – Smooth surface

3

Stem

Stainless Steel (AISI 304 / 316)

Blow-out proof design (T-head / Square drive)

4

Seat

Replaceable Soft Seat (EPDM / Buna-N / Viton / PTFE)

Field replaceable – No bonding required

5

O-Ring / Backup Ring

EPDM / Buna-N / Viton

Stem sealing

6

Bushings / Bearings

PTFE / Bronze backed PTFE

Stem support

7

Thrust Washer

PTFE / Nylon

8

Bottom Cover / Plug

Ductile Iron / Stainless Steel

With gasket

9

Handle / Gearbox

Ductile Iron / Steel (Epoxy coated)

Optional

10

Fasteners

Stainless Steel (304 / 316)

For gearbox / actuator mounting

Medium

Water, Wastewater, Seawater, Air, Mild Chemicals

Operating Temp.

Depends on seat material: EPDM (-30°C to +120°C) / Buna-N (-20°C to +90°C) / Viton (-20°C to +200°C) / PTFE (-30°C to +200°C)

Max Operating Pressure

Up to 200 psi / 16 bar (De-rate at high temps)

Leakage Rate

ISO 5208 Rate A (Bubble tight, zero leakage) – Soft seat

Flow Direction

Bidirectional (Standard) / Unidirectional (Optional)

Seat Type

Replaceable Resilient Seat – Line type / Cartridge type

Disc Type

Concentric (Center Line) – Pinless design

Stem Design

Blow-out proof – Retained by body / seat

Disc/Stem Connection

Pinless – Square drive / T-slot / Splined connection

Shell (Hydrostatic)

1.5 x Rated Pressure

API 598 / ISO 5208

Seat (Hydrostatic)

1.1 x Rated Pressure

API 598 / ISO 5208

Low Pressure Seat (Air)

80 psi / 0.6 MPa

Bubble tight (Rate A)

*(Note: For Class 150, typical shell test is 425 psi / 2.9 MPa)*

2″

50

43

85

3

4″

100

52

120

6

6″

150

56

150

10

8″

200

60

190

16

10″

250

68

230

25

12″

300

78

270

38

(Note: For larger sizes or exact dimensions, refer to certified GA drawing. Add actuator weight separately.)

Pinless Disc Design

Disc is staked / mechanically secured to stem without through-pins

Eliminates potential leak paths through disc, reduces turbulence, improves flow

Blow-Out Proof Stem

Stem is retained by body and seat; cannot be ejected under pressure

Enhanced safety in high-pressure applications

Replaceable Seat

Seat is mechanically retained (not bonded) and can be replaced in the field

Low maintenance cost, extended valve life

Nickel Plated Disc

Electroless nickel plating on ductile iron disc

Excellent corrosion resistance, smooth surface reduces friction