DN25-PN100 2-Piece Metal Seated Ball Valve
Description
TECHNICAL DATA SHEET
Product: 2-Piece Metal Seated Ball Valve
Size: DN25 (1 inch)
Pressure Rating: PN100 (Class 600)
Body Construction: 2-Piece, Floating Ball
Seat Type: Metal‑to‑Metal
End Connections: Flanged (EN 1092‑1 / ASME B16.5)
1. Basic Specifications
| Parameter | Value |
|---|---|
| Nominal Size | DN25 (1″) |
| Pressure Rating | PN100 (Class 600) |
| Valve Type | 2-Piece Floating Ball Valve |
| Body Construction | 2-Piece (Body + End Cap) |
| End Connections | Flanged – EN 1092‑1 PN100 or ASME B16.5 Class 600 (RF / RTJ) |
| Temperature Range | –29°C ~ +500°C (depending on hardfacing) |
| Suitable Media | High‑temperature steam, thermal oil, corrosive fluids, high‑pressure gas/liquid, abrasive slurries |
| Fire Safe Design | API 607 / ISO 10497 (inherently fire‑safe due to metal seats) |
2. Main Features
-
Metal‑to‑Metal Seating: Ball coated with tungsten carbide (WC) or Stellite; seat hardfaced with Stellite alloy. Provides exceptional wear, erosion, and high‑temperature resistance.
-
2-Piece Body: Compact construction, easy maintenance. The body joint is secured with high‑strength bolting.
-
Floating Ball Design: Under line pressure, the ball shifts slightly against the downstream seat, ensuring tight shut‑off under high differential pressure.
-
Blowout‑Proof Stem: Stem is designed to prevent ejection under pressure.
-
Fire Safe: Metal seated construction inherently meets fire‑safe requirements without additional coatings.
-
Spring‑Loaded Seats (Optional): Pre‑loaded seats maintain continuous contact with the ball, ensuring reliable sealing even at low pressure or under thermal cycling.
3. Material List (Recommended High‑Temperature / High‑Pressure Configuration)
| Item | Part | Standard Material |
|---|---|---|
| 1 | Body | A105N / F316 (ASTM A182) |
| 2 | End Cap | A105N / F316 |
| 3 | Ball | A105N / 316SS + Tungsten Carbide (WC) Coating |
| 4 | Seat Rings | 316SS + Stellite 21 Hardfacing |
| 5 | Stem | 17‑4PH / Inconel 718 |
| 6 | Stem Packing | Flexible Graphite + Braided Graphite |
| 7 | Body Gasket | Spiral Wound, SS + Graphite |
| 8 | Bolting | A193 B7 / A194 2H (carbon steel) or B8 / B8M (stainless steel) |
| 9 | Seat Springs (if applicable) | Inconel X‑750 / 17‑7PH |
Note: NACE MR0175 compliant materials available for sour service.
4. Dimensions & Structural Data (Flanged Ends)
| Parameter | Value |
|---|---|
| Face‑to‑Face Length (L) | ~160 mm (per EN 558 / ASME B16.10 for PN100 / Class 600) |
| Flange Standard | EN 1092‑1 PN100 or ASME B16.5 Class 600 |
| Flange Facing | Raised Face (RF) or Ring Type Joint (RTJ) |
| Top Height (H) | ~110 mm (with hand lever) |
| Operating Torque | ~30 – 60 N·m (metal seated, floating ball) |
| Approx. Weight | ~5 – 8 kg (flanged version) |
Note: Final dimensions to be confirmed by manufacturing drawings.
5. Design & Testing Standards
| Item | Standard |
|---|---|
| Design & Manufacture | ASME B16.34 / EN 12516 / API 608 |
| Flanged End Connections | EN 1092‑1 or ASME B16.5 |
| Pressure‑Temperature Rating | ASME B16.34 / EN 1092‑1 |
| Fire Safe Test | API 607 or API 6FA |
| Pressure Testing | API 598 or ISO 5208 |
| Low‑Pressure Air Test | 0.6 MPa (6 bar) – allowable leakage per API 598 (metal seated) |
| High‑Pressure Hydrostatic Test | 1.5 × rated pressure (body), 1.1 × rated pressure (seat) |
6. Metal Seated vs. Soft Seated Comparison
| Feature | Metal Seated | Soft Seated (PTFE / PEEK) |
|---|---|---|
| Temperature Range | –29°C ~ +500°C | –196°C ~ +260°C |
| Leakage Rate | API 598 Class V / VI (low, not bubble‑tight) | Bubble‑tight (zero leakage) |
| Abrasion Resistance | Excellent | Poor |
| Fire Safety | Inherently fire‑safe | Requires API 607 certification |
| Operating Torque | Higher | Lower |
| Suitable Media | High‑temp, steam, slurry, abrasive fluids | Clean fluids, cryogenic, chemicals |
7. Operating Torque & Actuator Sizing
-
Higher Torque Requirement: Metal seated valves typically require higher torque than soft seated valves due to metal‑to‑metal contact and spring preload.
-
Floating Ball Effect: In floating ball designs, torque increases with differential pressure as the ball is pressed against the downstream seat.
-
High‑Temperature Impact: Thermal expansion increases torque at elevated temperatures.
-
Safety Factor: Actuator output torque should be at least 1.3 – 1.5 times the maximum measured valve torque.
8. Typical Applications
-
Refineries: Fluid catalytic cracking (FCC) units, coker units, high‑temperature hydrocarbon service.
-
Power Plants: Boiler feedwater, main steam systems.
-
Thermal Oil Systems: High‑temperature heat transfer fluid circuits.
-
Chemical Processing: Corrosive fluids at elevated temperatures, slurry handling.
-
Coal Chemical: Black water, ash water, catalyst lines.
9. Ordering Information
When ordering, please specify:
-
Size: DN25
-
Pressure Rating: PN100 (Class 600)
-
Body Material: A105N / F316 / other
-
End Connections: Flanged (specify standard: EN 1092‑1 or ASME B16.5, facing type)
-
Hardfacing: Tungsten Carbide / Stellite 21 / other
-
Optional Features: NACE MR0175, spring‑loaded seats, pneumatic/electric actuator, locking device
This data sheet reflects the DN25 – PN100 2-Piece Metal Seated Ball Valve with flanged end connections. For specific dimensions, torque curves, or actuator sizing support, please contact us with your detailed requirements.
