DN80-PN40 NRS SS Globe Valve
Description
TECHNICAL DATA SHEET
Product: DN80 – PN40 NRS Globe Valve
Material: Stainless Steel
Stem Type: Non-Rising Stem (NRS)
1. General Description
This Non-Rising Stem (NRS) globe valve is designed for DN80 (3″) PN40 service. The NRS design features a stem that rotates but does not move vertically, resulting in a compact overall height—ideal for installations with limited overhead space such as underground pipelines, pits, and pump rooms. Constructed from stainless steel, the valve offers excellent corrosion resistance and is suitable for a wide range of industrial applications including water treatment, chemical processing, steam systems, and oil & gas services.
2. Specifications
| Parameter | Value |
|---|---|
| Size | DN80 (3″) |
| Pressure Rating | PN40 (ASME Class 300 equivalent) |
| Design Type | Non-Rising Stem (NRS), bolted bonnet |
| End Connections | [e.g., Raised Face (RF) Flanges to EN 1092-1 / ASME B16.5] |
| Applicable Media | Water, steam, oil, gas, mild corrosive fluids |
| Temperature Range | -29°C to +200°C (depending on seat and packing material) |
| Flow Direction | Under the disc (preferred for tight shut-off) |
3. Material Specification
| Item | Component | Material | Standard |
|---|---|---|---|
| 1 | Body | Stainless Steel | ASTM A351 CF8M / CF8 / A216 WCB (specify) |
| 2 | Bonnet | Stainless Steel | ASTM A351 CF8M / CF8 / A216 WCB |
| 3 | Disc | Stainless Steel | ASTM A351 CF8M / CF8 |
| 4 | Stem | Stainless Steel | ASTM A479 316 / 304 |
| 5 | Seat | Stainless Steel / Stellite | Integral / hardfaced |
| 6 | Packing | PTFE / Graphite | — |
| 7 | Gasket | Spiral Wound (SS/Graphite) / PTFE | — |
| 8 | Bolting | Stainless Steel | ASTM A193 B8 / B8M |
4. Key Features
-
Non-Rising Stem (NRS): The stem rotates within the bonnet without linear movement, reducing the valve’s overall height. This design is ideal for underground installations, valve pits, and locations with limited headroom.
-
Stainless Steel Construction: Provides excellent resistance to corrosion, erosion, and high temperatures. Suitable for demanding environments including chemical, marine, and steam applications.
-
Globe Valve Design: Offers superior throttling capability and positive shut-off compared to gate valves. The flow path creates pressure drop that allows precise flow control.
-
Bolted Bonnet: Facilitates easy in-line maintenance and repacking without removing the valve from the pipeline.
-
Integral Seat or Stellite Hardfacing (Optional): Provides extended service life in high-temperature or abrasive conditions.
-
Anti-Static Design (Optional): Available for applications requiring static charge dissipation.
5. Dimensional Data (Typical)
| Parameter | Value |
|---|---|
| Face-to-Face Dimension | [e.g., 280 mm / 11.0″ per EN 558 / ASME B16.10] |
| Flange Dimensions | EN 1092-1 PN40 / ASME B16.5 Class 300 |
| Overall Height (Closed) | [e.g., 350 mm / 13.8″] |
| Handwheel Diameter | [e.g., 250 mm / 9.8″] |
| Weight (Approx.) | [e.g., 35 kg / 77 lbs] |
Note: Dimensions vary by manufacturer; please refer to actual product drawings.
6. Testing & Compliance
-
Design Standard: EN 13709 / ASME B16.34
-
Face-to-Face: EN 558 Series 1 / ASME B16.10
-
Flange Connection: EN 1092-1 / ASME B16.5
-
Pressure Testing: EN 12266 / API 598
-
Material Certification: EN 10204 Type 3.1
7. Applications
-
Water distribution systems (underground or pit installations)
-
Steam and condensate lines
-
Chemical processing plants
-
HVAC and building services
-
Oil and gas pipelines
-
Marine and offshore utilities
8. Ordering Information
Please specify the following when ordering:
| Parameter | Options |
|---|---|
| Body Material | CF8M (316 SS) / CF8 (304 SS) / WCB (Carbon Steel) |
| Seat Material | Integral stainless steel / Stellite hardfaced |
| Packing Material | PTFE / Graphite |
| End Connections | EN 1092-1 PN40 / ASME B16.5 Class 300 / Other |
| Actuation (Optional) | Handwheel / Gear operator / Electric actuator / Pneumatic actuator |
| Special Requirements | NACE MR0175 / Fire safe / Anti-static |
9. Notes
-
NRS vs. OS&Y: The Non-Rising Stem (NRS) design is recommended where vertical space is constrained. For applications requiring visual stem position indication, an Open Stem & Yoke (OS&Y) design may be preferred.
-
Flow Direction: For optimal shut-off performance, the valve should be installed with pressure under the disc (flow entering below the seat). Verify direction arrow on the valve body.
