Loose Liner Wafer-Type Butterfly Valve c/w Gear
Categories: Butterfly Valves, Concentric Disc
Description
Technical Datasheet: Wafer Type Butterfly Valve
(Ductile Iron Body / Nickel Plated Disc / Pinless Design / Blow-Out Proof Stem / Replaceable Seat)
Project Name: ____________________ Item No.: ____________________
Tag No.: ____________________ Quantity: ____________________
1. General Information
| Item | Standard Configuration | User Specification / Remarks |
|---|---|---|
| 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 |
2. Bill of Materials (Main Components)
| No. | Part Name | Material | Remarks |
|---|---|---|---|
| 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 |
3. Technical Parameters & Performance
| Item | Specification |
|---|---|
| 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 |
4. Test Pressure (Reference: Class 150 / PN16)
| Test Type | Pressure | Standard |
|---|---|---|
| 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)* |
5. Dimensions & Weight (Reference: Wafer Type, API 609 Short Pattern)
| NPS | DN (mm) | L (Face-to-Face) mm | H (Open) mm (approx) | Weight (kg) approx |
|---|---|---|---|---|
| 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.) |
6. Special Requirements / Options
-
Seat Material: EPDM / Buna-N (NBR) / Viton (FKM) / PTFE / Silicone
-
Disc Coating: Nickel Plated (Standard) / Nylon Coated / Epoxy Coated / Stainless Steel Disc (CF8/CF8M)
-
Stem Material: Stainless Steel 304 / 316 / 17-4PH / Monel
-
Operation: Lever / Gearbox / Pneumatic Actuator / Electric Actuator
-
Locking Device: Yes / No (For lever operated)
-
Position Indicator: Yes / No
-
Stem Extension: Yes / No (For buried service)
-
Test Certificate: EN 10204 3.1
-
Coating: Epoxy coating (Min. 250 microns) – Color: Blue / RAL 5015 / Custom
-
Special Cleaning: For Potable Water (NSF/ANSI 61) / Food grade
Design Features:
| Feature | Description | Benefit |
|---|---|---|
| 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 |
Note: This datasheet is prepared for a Wafer Type Butterfly Valve with pinless disc, blow-out proof stem, and replaceable soft seat. Ensure selected seat material is compatible with the service medium and temperature range.
