JIS 5K-50A SDNR Globe Valve Ready for Actuators
Description
Technical Data Sheet
JIS Standard Screw-Down Non-Return (SDNR) Globe Valve
Product: JIS Standard Screw-Down Non-Return (SDNR) Globe Valve
Valve Type: Globe Pattern, Flanged Ends
Model: SF-H41 Series (Lift Type SDNR)
Standard: Japanese Industrial Standard (JIS)
1. Product Description
A Screw-Down Non-Return (SDNR) Globe Valve is a multifunctional valve that combines the functions of an isolation valve and a check valve. Unlike a standard globe valve, the disc is not rigidly attached to the stem. When the stem is screwed down, it forces the disc onto the seat to stop flow. When the stem is raised, the disc is free to lift and lower automatically in response to flow direction, acting as a non-return check valve to prevent backflow.
2. Design & Inspection Standards
| Item | Standard / Code | Remarks |
|---|---|---|
| Design & Manufacturing | JIS B 2073 (Steel Valves) / JIS B 2011 (Cast Iron) | For globe and check functions |
| Face-to-Face Dimension | JIS B 2002 | Basic dimensions for valves |
| Flange Dimensions | JIS B 2220 (JIS 10K / 20K / 40K) | Flange drilling and dimensions |
| Pressure-Temperature Rating | JIS B 2073 / JIS B 2202 | Rating tables per material |
| Inspection & Testing | JIS B 2003 | Shell and seat tests |
| Leakage Standard | JIS B 2005 Class A (Zero visible leakage) | For seat test |
3. Technical Parameters
| Item | Technical Parameter | Remarks |
|---|---|---|
| Valve Type | Screw-Down Non-Return (SDNR) Globe Valve | Rising stem, bolted bonnet |
| Size Range | DN15 (1/2″) ~ DN400 (16″) | Larger sizes available upon request |
| Pressure Class | JIS 5K / JIS 10K / JIS 20K / JIS 40K | Most common: 10K and 20K for marine/industrial use |
| Connection Type | Flanged Ends | JIS B2220 RF (Raised Face) or FF (Flat Face) |
| Operation | Manual Handwheel (Rising Stem) | Stem rises when opening, lowers when closing |
| Temperature Range | -29°C ~ +425°C | Carbon Steel: up to 425°C; SST: up to 400°C |
| Applicable Media | Steam, Water, Oil, Gas, Non-corrosive fluids | Application varies by material selection |
| Flow Direction | Under the Seat (Standard) | Flow enters below the disc and exits above the seat |
| Shell Test Pressure | 1.5 x Rated Pressure | Per JIS B 2003 |
| High-Pressure Seat Test | 1.1 x Rated Pressure | Per JIS B 2003 |
| Low-Pressure Seat Test | 0.5 – 0.7 MPa | Air or Nitrogen |
4. Material Specifications (Typical Configurations)
| Part Name | Carbon Steel Grade | Stainless Steel Grade | Cast Iron Grade |
|---|---|---|---|
| Body | SCPH2 / SCPH21 (JIS G5151) | SCS13A (JIS G5121) / SCS14A | FC200 / FC250 (JIS G5501) |
| Bonnet / Cover | SCPH2 | SCS13A | FC200 |
| Disc | SCPH2 + STL (Stellite Hardface) | SCS13A / SCS14A | FC200 + Bronze Trim |
| Stem | SUS403 (Stainless) / SUS304 | SUS304 / SUS316 | SUS403 / SUS304 |
| Seat Ring | SCPH2 + STL | SCS13A / SCS14A | Bronze / FC200 + Bronze |
| Gland Packing | Graphite / PTFE | Graphite / PTFE | Graphite / PTFE |
| Gasket | Spiral Wound (304+Graphite) | Spiral Wound (304+Graphite) | Joint Sheet / Graphite |
| Studs & Nuts | SNB7 / S45C | SUS304 | SWCH / S45C |
| Handwheel | Cast Iron (FC200) / Fabricated Steel | Cast Iron / Stainless Steel | Cast Iron (FC200) |
5. Dimensional Data (JIS 10K / 20K SDNR Globe Valve)
Reference dimensions based on JIS B 2002 and common manufacturer data.
JIS 10K Flange Dimensions (Per JIS B2220)
| Size (DN / A) | Flange O.D. (D) | Bolt Circle (C) | Bolt Holes (N-Φ) | Flange Thick (t) |
|---|---|---|---|---|
| 50A (2″) | 155 | 120 | 4-19 | 16 |
| 80A (3″) | 185 | 150 | 8-19 | 18 |
| 100A (4″) | 210 | 175 | 8-19 | 18 |
| 150A (6″) | 280 | 240 | 8-23 | 20 |
| 200A (8″) | 330 | 290 | 12-23 | 22 |
| 250A (10″) | 400 | 355 | 12-25 | 24 |
| 300A (12″) | 445 | 400 | 16-25 | 24 |
JIS 20K Flange Dimensions (Per JIS B2220)
| Size (DN / A) | Flange O.D. (D) | Bolt Circle (C) | Bolt Holes (N-Φ) | Flange Thick (t) |
|---|---|---|---|---|
| 50A (2″) | 155 | 120 | 8-19 | 18 |
| 80A (3″) | 200 | 160 | 8-23 | 22 |
| 100A (4″) | 225 | 185 | 8-23 | 24 |
| 150A (6″) | 305 | 260 | 12-25 | 28 |
| 200A (8″) | 350 | 305 | 12-25 | 30 |
| 250A (10″) | 430 | 380 | 12-27 | 32 |
| 300A (12″) | 480 | 430 | 16-27 | 36 |
Face-to-Face Length (L) & Height (Approx)
*Face-to-face dimensions follow JIS B2002 for globe valves.*
| Size (DN / A) | JIS 10K Face-to-Face (L) | JIS 20K Face-to-Face (L) | Approx Height (H) Open |
|---|---|---|---|
| 50A (2″) | 203 mm | 267 mm | ~350 mm |
| 80A (3″) | 241 mm | 318 mm | ~420 mm |
| 100A (4″) | 292 mm | 356 mm | ~500 mm |
| 150A (6″) | 356 mm | 394 mm | ~650 mm |
| 200A (8″) | 495 mm | 533 mm | ~800 mm |
| 250A (10″) | 622 mm | 660 mm | ~950 mm |
| 300A (12″) | 698 mm | 711 mm | ~1150 mm |
6. Design Features
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Screw-Down Mechanism: The stem is threaded and can be manually screwed down to force the disc onto the seat, providing positive shut-off independent of line pressure .
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Non-Return Function: When the stem is fully raised, the disc is free-floating. It lifts automatically when forward flow occurs and drops onto the seat when flow ceases or reverses, preventing backflow .
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Rising Stem Design: The stem rises as the valve is opened, providing a visual indication of the valve position .
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Guided Disc: The disc is guided by a precision-machined cage or bore in the bonnet, ensuring proper alignment during both manual closing and automatic check operation .
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Renewable Seat: The seat ring is typically threaded or welded-in, allowing for field replacement without replacing the entire body .
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Backflow Prevention: Essential for protecting pumps, boilers, and compressors from damage caused by reverse flow and water hammer .
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Full Bore / Reduced Bore: Typically a reduced bore design (globe pattern) to maximize sealing efficiency and control flow .
7. Applications
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Marine Engineering: Boiler feed water systems, fuel oil systems, cooling water lines on ships .
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Power Plants: Steam and feedwater isolation where backflow prevention is critical .
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Industrial Pump Discharge: Prevents reverse rotation of pumps when shut down .
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Compressed Air Systems: Prevents backflow of air into idle compressors .
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Steam Systems: Used on steam branch lines where both isolation and check functions are required .
Note:
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This data sheet specifically covers the Screw-Down Non-Return (SDNR) Globe Valve, which is the correct terminology for this product type .
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Dimensions are based on JIS standards and may vary slightly between manufacturers.
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For JIS 40K and higher pressure classes, please consult the manufacturer for specific material and dimensional data.
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Certified drawings should be requested for final installation and flange matching.