DN25-PN63 Closed Die Forged Steel Globe Valve
Description
Technical Data Sheet – Forged Steel Globe Valve
BB · OS&Y · Renewable Seat · Flanged Ends · A105 · DN25 · PN63
1. Product Overview
-
Product Name: Forged Steel Globe Valve
-
Valve Type: Globe Valve
-
Design Standard: API 602 (锻钢阀门设计) / ASME B16.34
-
Face-to-Face Standard: EN 558 (Series 1) or Manufacturer’s Standard
-
Flange Standard: EN 1092-1 (Type B1 or D, raised face)
-
Pressure Class: PN63
-
Nominal Size: DN25 (1″)
-
Body Material: ASTM A105 (Carbon Steel)
-
Bonnet Type: Bolted Bonnet (BB)
-
Stem Type: OS&Y (Outside Screw and Yoke) with rising stem
-
Seat Type: Renewable Seat (RS) – threaded-in or welded-in renewable seat ring
-
Operation: Manual Handwheel
-
Connection: Flanged Ends
2. Applicable Standards & Specifications
| Item | Standard |
|---|---|
| Design and Manufacture | API 602, ASME B16.34 |
| Pressure–Temperature Rating | ASME B16.34 (applicable for A105 at PN63 equivalent) |
| Flange Dimensions | EN 1092-1 (Type B1 – raised face) |
| Face-to-Face Dimensions | EN 558 (Series 1) or ISO 5752 |
| Inspection and Testing | API 598 / EN 12266-1 |
3. Technical Parameters
| Parameter | Specification |
|---|---|
| Nominal Size | DN25 (1 inch) |
| Pressure Class | PN63 |
| Design Temperature Range | -29°C to 425°C (A105 carbon steel) |
| Flange Type | Raised face, EN 1092-1 Type B1 |
| Flange Face Finish | 3.2 to 6.3 µm Ra (standard) |
| Operation | Handwheel (manual) |
| Stem Design | Rising stem, OS&Y |
| Bonnet Design | Bolted bonnet with spiral wound gasket |
| Seat Design | Renewable seat ring (threaded or welded) |
| Leakage Rate | API 598 / EN 12266-1 Rate A (bubble tight) |
| Shell Test Pressure | 1.5 × PN63 = 94.5 bar (hydrostatic) |
| Seat Test Pressure | 1.1 × PN63 = 69.3 bar (hydrostatic) |
4. Material of Parts
| Part Name | Material | Standard |
|---|---|---|
| Body | ASTM A105 | Carbon steel forging |
| Bonnet | ASTM A105 | Carbon steel forging |
| Disc | ASTM A105 + Stellite hardfacing | Hardfaced seat surface |
| Seat Ring (Renewable) | ASTM A105 + Stellite hardfacing | Threaded-in or welded |
| Stem | ASTM A182 F6a (13Cr) | Stainless steel, hardened |
| Bonnet Bolts | ASTM A193 B7 | Alloy steel |
| Bonnet Nuts | ASTM A194 2H | Carbon steel |
| Gasket | Spiral wound 316SS + Flexible graphite | For bolted bonnet |
| Packing | Flexible graphite | Anti-extrusion rings |
| Packing Gland | ASTM A105 / 304 SS | Carbon or stainless |
| Handwheel | ASTM A197 Cast iron / Ductile iron | — |
| Stem Nut | Copper alloy / Bronze | — |
5. Dimensional Data (Approximate)
Note: Final dimensions to be confirmed with manufacturer’s drawing.
| Description | Value (mm) |
|---|---|
| End‑to‑End Length (L) | 160 mm (typical per EN 558 Series 1) |
| Flange Diameter (D) | 140 mm (EN 1092-1 PN63 DN25) |
| Bolt Circle Diameter (K) | 100 mm |
| Number of Bolt Holes | 4 |
| Bolt Hole Diameter | 18 mm |
| Flange Thickness (C) | 18 mm |
| Raised Face Diameter (d) | 68 mm |
| Raised Face Height | 2 mm |
| Overall Height (H) – Open | ~210 mm |
| Handwheel Diameter | 125 mm |
| Approx. Weight | 5.5 kg |
6. Design Features
-
Bolted Bonnet (BB): Allows easy access for inspection and maintenance; uses spiral wound gasket for reliable sealing at high pressures.
-
OS&Y (Outside Screw and Yoke): Stem threads are outside the valve body, protected from the medium, and clearly indicate valve position.
-
Renewable Seat (RS): Seat ring can be replaced without replacing the entire body, extending valve life and reducing maintenance cost.
-
Forged Body: A105 forging provides excellent mechanical strength and integrity compared to castings.
-
Hardfaced Seats: Disc and seat are hardfaced with Stellite to resist erosion and galling.
-
Backseat: Provides secondary stem seal and allows packing replacement under pressure when valve is fully open.
-
Anti‑Blowout Stem: Integral shoulder prevents stem ejection due to internal pressure.
7. Inspection & Testing
-
Hydrostatic Shell Test: 94.5 bar (duration per API 598).
-
Hydrostatic Seat Test: 69.3 bar.
-
Low‑Pressure Pneumatic Test: Optional, 6 bar.
-
Material Certification: EN 10204 3.1 available on request.
-
Traceability: Full material traceability from billet to finished product.
Remarks:
-
PN63 rating corresponds to approximately Class 400. For exact pressure/temperature limits, refer to ASME B16.34 or EN 1092-1 Annex.
-
Flange facing and drilling comply with EN 1092-1 Type B1 (raised face). Other flange types (e.g., Type D – plain face) available on request.
-
For sour service (H₂S), NACE MR0175/ISO 15156 compliance can be offered with additional hardness control.
This data sheet is for reference only. All specifications are subject to final confirmation by the manufacturer.
