Metal Seated RS Gate Valve
Description
Technical Datasheet: Rising Stem Gate Valve
(Cast Iron Body / Bronze Seated / Brass Stem / Flanged / Handwheel)
Project Name: ____________________ Item No.: ____________________
Tag No.: ____________________ Quantity: ____________________
1. General Information
| Item | Standard Configuration | User Specification / Remarks |
|---|---|---|
| Valve Type | Rising Stem Gate Valve (OS&Y – Outside Screw & Yoke) | Stem rises when valve opens |
| Body Material | Cast Iron (ASTM A126 Class B / EN-GJL-250) | |
| Seat Material | Bronze (Integral or renewable) | Bronze-to-bronze sealing |
| Stem Material | Brass (C36000 / C37700) | Corrosion resistant |
| End Connection | Flanged (ASME B16.1 Class 125 / EN 1092-2) | |
| Operation | Handwheel | Malleable iron / Ductile iron handwheel |
| Design Standard | MSS SP-70 / ASME B16.34 (mod) | Cast Iron Gate Valve Standard |
| Face-to-Face | ASME B16.10 / MSS SP-70 (Flanged ends) | |
| Flange Dimension | ASME B16.1 Class 125 / EN 1092-2 PN10/PN16 | |
| Inspection & Test | API 598 / MSS SP-70 | |
| Pressure Rating | Class 125 / PN10 / PN16 | |
| Size Range | 2″ – 12″ (DN50 – DN300) | |
| Temperature Range | -20°C to +150°C (Limitation of brass stem and bronze seats) | |
| Stem Type | Rising Stem (OS&Y) | Outside screw & yoke |
| Wedge Type | Solid wedge / Double disc (Optional) |
2. Design Features
| Feature | Description | Benefit |
|---|---|---|
| Rising Stem (OS&Y) | Stem rises when valve opens; visible position indicator | Visual confirmation of valve position, threads outside fluid path |
| Handwheel Operation | Sturdy handwheel for manual operation | Easy to operate, torque multiplication |
| Bronze Seated | Seat rings and wedge faces are bronze | Excellent corrosion resistance, long life, smooth operation |
| Full Port Design | Straight-through full bore | Low pressure drop, allows pigging |
| Outside Screw & Yoke | Stem threads are outside the valve, protected from media | Longer stem life, easy lubrication |
| Renewable Seat Rings | Seat rings can be replaced (optional) | Extended valve life |
| Cast Iron Body | Robust, cost-effective | Suitable for water and non-corrosive services |
| Flanged Connections | Drilled per ASME/EN standards | Easy installation and removal |
3. Bill of Materials (Main Components)
| No. | Part Name | Material | Remarks |
|---|---|---|---|
| 1 | Body | Cast Iron (ASTM A126 Class B) | |
| 2 | Bonnet | Cast Iron (ASTM A126 Class B) | |
| 3 | Wedge / Gate | Bronze (ASTM B62 / B584) | Solid wedge, bronze faces |
| 4 | Seat Ring (Body) | Bronze (ASTM B62) | Thread-in or pressed-in |
| 5 | Stem | Brass (C36000 / C37700) | Rising stem (OS&Y) |
| 6 | Stem Nut / Yoke Sleeve | Bronze (ASTM B62) | Threaded engagement with stem |
| 7 | Packing | Graphite / PTFE | |
| 8 | Gland / Gland Flange | Cast Iron / Ductile Iron | |
| 9 | Yoke | Cast Iron (ASTM A126 Class B) | |
| 10 | Bonnet Gasket | Compressed Fiber / Graphite | |
| 11 | Bonnet Bolts / Studs | Steel (Zinc Plated) / Stainless Steel | |
| 12 | Handwheel | Malleable Iron / Ductile Iron | |
| 13 | Handwheel Nut | Steel / Brass | |
| 14 | Nameplate | Stainless Steel / Aluminum |
4. Technical Parameters & Performance
| Item | Specification |
|---|---|
| Medium | Water, Oil, Gas, Air, Steam, Non-corrosive Fluids |
| Operating Temperature | -20°C to +150°C (Brass stem limit) |
| Max Working Pressure | Class 125: 200 psi @ 100°F / 13.8 bar @ 38°C (Derate at higher temps) |
| Seat Material | Bronze-to-Bronze |
| Sealing Performance | API 598: Liquid – No visible leakage; Air – Class B permissible |
| Flow Direction | Bidirectional |
| Flow Characteristic | On-Off (Not for throttling) |
| Bore Type | Full Bore (Standard) |
| Stem Design | Outside Screw & Yoke (OS&Y), Rising Stem |
| Handwheel Rotation | Clockwise to Close |
| Installation Position | Any position |
5. Test Pressure (Reference: Per API 598 / MSS SP-70)
| Pressure Rating | Shell Test (Hydrostatic) | Seat Test (Hydrostatic) | Low Pressure Seat Test (Pneumatic) |
|---|---|---|---|
| Class 125 | 400 psi (2.8 MPa) | 200 psi (1.4 MPa) | 50-80 psi (0.34-0.55 MPa) |
| PN10 | 15 bar (1.5 MPa) | 11 bar (1.1 MPa) | 0.6 bar (60 kPa) |
| PN16 | 24 bar (2.4 MPa) | 17.6 bar (1.76 MPa) | 0.6 bar (60 kPa) |
| *(Note: Tests performed per API 598 / EN 12266-1)* |
6. Dimensions & Weight (Reference: ASME B16.10 / Class 125 Flanged)
| NPS | DN (mm) | L (Face-to-Face) mm | H (Open) mm (approx) | Handwheel Diameter (mm) | Weight (kg) approx |
|---|---|---|---|---|---|
| 2″ | 50 | 178 | 280 | 160 | 18 |
| 2½” | 65 | 190 | 320 | 180 | 24 |
| 3″ | 80 | 203 | 360 | 200 | 32 |
| 4″ | 100 | 229 | 430 | 250 | 45 |
| 5″ | 125 | 254 | 500 | 280 | 60 |
| 6″ | 150 | 267 | 560 | 300 | 75 |
| 8″ | 200 | 292 | 700 | 350 | 115 |
| 10″ | 250 | 330 | 850 | 400 | 165 |
| 12″ | 300 | 356 | 1000 | 450 | 225 |
| *(Note: For PN10/PN16 flanges, dimensions may vary slightly. Refer to certified GA drawing for exact dimensions.)* |
7. Flange Drilling (Reference: ASME B16.1 Class 125)
| NPS | DN (mm) | Flange OD (mm) | Bolt Circle (mm) | Number of Bolts | Bolt Size (in) |
|---|---|---|---|---|---|
| 2″ | 50 | 152 | 121 | 4 | 5/8″ |
| 2½” | 65 | 178 | 140 | 4 | 5/8″ |
| 3″ | 80 | 191 | 152 | 4 | 5/8″ |
| 4″ | 100 | 229 | 190 | 8 | 5/8″ |
| 5″ | 125 | 254 | 216 | 8 | 3/4″ |
| 6″ | 150 | 279 | 241 | 8 | 3/4″ |
| 8″ | 200 | 343 | 298 | 8 | 3/4″ |
| 10″ | 250 | 406 | 362 | 12 | 7/8″ |
| 12″ | 300 | 483 | 432 | 12 | 7/8″ |
| *(Note: For PN10/PN16 flanges, refer to EN 1092-2 standards)* |
8. Special Requirements / Options
-
Pressure Rating: Class 125 / PN10 / PN16
-
Flange Standard: ASME B16.1 Class 125 / ASME B16.5 Class 150 / EN 1092-2 PN10/PN16
-
Seat Type: Integral / Renewable bronze seat rings
-
Wedge Material: Bronze (Standard) / Cast Iron with Bronze overlay / Stainless Steel
-
Stem Material: Brass (Standard) / Stainless Steel (304/316) / Bronze
-
Bonnet Type: Bolted bonnet (Standard) / Screwed-in bonnet
-
Packing Material: Graphite / PTFE / Non-asbestos
-
Handwheel: Malleable iron / Ductile iron / Cast iron
-
Test Certificate: EN 10204 Type 2.2 / 3.1
-
Special Cleaning: For potable water / Oxygen service
-
NACE Compliance: MR0175 (Requires material upgrade)
-
Accessories: Locking device / Extension stem / Position indicator / Chainwheel / Gear operator (for larger sizes)
Design Notes:
-
Rising Stem (OS&Y) : The stem rises when the valve opens, providing clear visual indication of valve position. Stem threads are outside the valve body, protected from the media, allowing for easy lubrication and longer service life.
-
Handwheel Operation: Provides mechanical advantage for easy operation. Standard rotation is clockwise to close.
-
Bronze Trim: Provides excellent corrosion resistance and long-term reliable sealing. Bronze-on-bronze seats are standard for water and low-pressure steam services.
-
Cast Iron Body: Suitable for non-shock applications; must be protected from rapid temperature changes and water hammer.
-
Flanged Connections: Conform to ASME B16.1 Class 125 standards, allowing for easy installation and removal from pipeline.
Application Notes:
-
Suitable for: Water distribution, wastewater, irrigation, fire protection, HVAC, and general industrial services.
-
Not suitable for: High-pressure steam, severe thermal cycling, or highly corrosive fluids (consult manufacturer for material upgrades).
-
Installation: Can be installed in any position. Ensure proper gasket selection for flange sealing.
Note: This datasheet is prepared for a Rising Stem Gate Valve with cast iron body, bronze seats, brass stem, flanged ends (ASME B16.1 Class 125), and handwheel operation per MSS SP-70 / API 598. Ensure selected materials, pressure rating, and trim are compatible with the specific service conditions.
