Cast Steel Parallel Slide Blow Off Valve (Flanged)
Flanged · Steam, Water
Shell 48 kg/cm²g (700 Max 425°C
Overview
Cast Steel Parallel Slide Blow Off Valve (Flanged) for steam, water service. End connection: flanged. Refer to bill of materials and dimensions below for full technical specification.
Salient Features
- Flanged Ends to BS 10 Table ‘J’
- Maintains fluid tightness and is easy in operation because of sliding action of discs
- Discs are kept in close contact with body rings by means of a spring when the valve is under pressure
- Premium Quality lubricated Gland Packing, Bolted Bonnet
- Valve is operated by means of Rack and Pinion arrangement, in such a manner that valve is opened fully with half turn of the box key
- Gland forms a locking guard which prevents removal of the key unless the valve is closed
Test & Service Limits
| Test / Parameter | Value |
|---|---|
| Hydrostatic shell test | 48 kg/cm²g (700 psig) |
| Hydrostatic seat test | 24.50 kg/cm²g (350 psig) |
| Maximum working temperature | 425°C |
Service media: Steam, Water.
Bill of Materials
| P.No. | Part | Material | Specification | Qty. |
|---|---|---|---|---|
| 1 | Bonnet Cast Steel IBR 73 – 80 Gr. B 1 | — | — | 1 |
| 2 | Rack | Bronze | IBR 282 (a) (iv) Gr. B | 1 |
| 3 | Studs Alloy Steel ASTM A 193 Gr. B7 As Reqd. | — | — | 1 |
| 4 | Nuts H.T Steel ASTM A 194 Gr. 2H As Reqd. | — | — | 1 |
| 5 | Body Cast Steel IBR 73 – 80 Gr. B 1 | — | — | 1 |
| 6 | Gasket Steam Joining Sheet IS 2712 Gr. W/3 1 | — | — | 1 |
| 7 | Body Seat Ring | Stainless Steel | ASTM A 276 Type 410 | 1 |
| 8 | Male Disc | Stainless Steel | ASTM A 276 Type 410 | 1 |
| 9 | Female Disc | Stainless Steel | ASTM A 276 Type 410 | 1 |
| 10 | Spring | Stainless Steel | IS 4454 Part 4 Gr. 2 | 1 |
| 11 | Pinion | Stainless Steel | ASTM A 276 Type 410 | 1 |
| 12 | Nuts H.T Steel ASTM A 194 Gr. 2H As Reqd. | — | — | 1 |
| 13 | Studs Alloy Steel ASTM A 193 Gr. B7 As Reqd. | — | — | 1 |
| 14 | Gland | Bronze | IBR 282 (a) (iv) Gr. B | 1 |
| 15 | Gland Packing | PTFE / graphite rings | — | — |
| 16 | Stuffing Box | Bronze | IBR 282 (a) (iv) Gr. B | 1 |
| 17 | Gasket Steam Joining Sheet IS 2712 Gr. W/3 1 | — | — | 1 |
| 18 | Nuts Alloy Steel ASTM A 193 Gr. B7 As Reqd. | — | — | 1 |
| 19 | Studs H.T Steel ASTM A 194 Gr. 2H As Reqd. | — | — | 1 |
Sizes / Dimensions
| Size (Inches) Size (mm) A ±1.5 B ~ | ||||
|---|---|---|---|---|
| 1 | 25 | 178 | 180 | |
| 1 | 1/4 | 32 | 241 | 190 |
| 1 | 1/2 | 40 | 267 | 220 |
| 2 | 50 | 305 | 244 |
Dimensions per datasheet table. Confirm flange standard and size at enquiry.