DN80-PN40-RF Soft Seated Globe Valve
DN80-PN40-RF Soft Seated Globe Valve - Image 2
DN80-PN40-RF Soft Seated Globe Valve - Image 3
DN80-PN40-RF Soft Seated Globe Valve - Image 4

DN80-PN40-RF Soft Seated Globe Valve

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Description

Technical Data Sheet

Product: DN80 – PN40 Flanged Soft Seated Globe Valve
Model: [To be specified]

1. Product Description

This flanged globe valve features a soft‑seated design, providing excellent shut‑off performance with minimal leakage. The globe valve configuration offers precise flow regulation and reliable on‑off control. The soft seat ensures bubble‑tight sealing, making it ideal for applications where leakage integrity is critical. Constructed with a rising stem and handwheel operator, this valve is suitable for a wide range of industrial services including water, oil, gas, steam, and mild corrosive media.

2. Main Technical Parameters

Parameter Value / Description
Nominal Size DN80
Pressure Rating PN40 (4.0 MPa / 40 bar)
End Connection Flanged, Raised Face (RF) — EN 1092‑1 / ASME B16.5 or equivalent
Body Construction Globe valve, bolted bonnet, soft seated
Disc Type Plug disc or flat disc (depending on design)
Stem Type Rising stem, outside screw and yoke (OS&Y) or non‑rising stem (optional)
Temperature Range –29°C ~ +150°C (depending on seat/packing materials)
Applicable Media Water, oil, gas, steam, mild corrosive fluids
Flange Standard EN 1092‑1 PN40 / ASME B16.5 Class 300 (customer specified)
Face‑to‑Face EN 558 Series 1 / ASME B16.10

3. Bill of Materials (Typical)

No. Part Name Standard Material Optional Material
1 Body WCB (Carbon Steel) CF8 / CF8M (Stainless Steel), CF3M
2 Bonnet WCB (Carbon Steel) CF8 / CF8M, CF3M
3 Disc A182 F304 / F316 17‑4PH, Monel
4 Seat Ring A182 F304 / F316 (integral or threaded) A182 F316L, Stellite® hardfaced (optional)
5 Soft Seat Insert PTFE (Polytetrafluoroethylene) RPTFE (Reinforced PTFE), PEEK
6 Stem A182 F304 / F316 17‑4PH, Monel
7 Packing PTFE V‑ring set Flexible graphite
8 Gasket Spiral wound (SS + graphite) PTFE, metal ring
9 Handwheel Cast iron / Carbon steel Stainless steel
10 Fasteners A193 B7 (Carbon steel) A193 B8 (Stainless steel)

4. Key Features

  1. Soft Seat Design

    • PTFE or reinforced PTFE seat insert provides bubble‑tight shut‑off (zero leakage).

    • Low friction between disc and seat reduces operating torque and extends service life.

  2. Globe Valve Flow Characteristics

    • Excellent throttling and flow regulation capabilities.

    • Suitable for frequent operation and precise control.

  3. Rising Stem (OS&Y)

    • Stem threads are isolated from the media, reducing corrosion and wear.

    • Visual indication of valve position (open/closed).

  4. Bolted Bonnet Construction

    • Easy maintenance and access to internal components.

    • Reliable sealing with spiral wound gasket.

  5. Optional Features

    • Bellows seal for zero stem leakage.

    • Gear operator for larger sizes or higher pressures.

    • Pneumatic or electric actuation for automated control.

5. Dimensions & Weight (Reference)

Values are typical for EN 1092‑1 PN40 RF flanges. Final dimensions to be confirmed from certified GA drawings.

Item Dimension (mm)
Nominal Size DN80
Face‑to‑Face (L) Approx. 310 mm (EN 558 Series 1)
Flange Outer Diameter (D) Approx. 200 mm
Flange Thickness (b) Approx. 24 mm
Bolt Circle Diameter (K) Approx. 160 mm
Bolt Hole Diameter (d) Approx. 18 mm
Number of Bolt Holes 8
Overall Height (H) (open) Approx. 400 – 500 mm (handwheel operated)
Approx. Weight 25 – 35 kg

6. Design & Manufacturing Standards

Standard Description
Design BS 1873, API 623, ASME B16.34, EN 13709
Pressure‑Temperature Rating ASME B16.34, EN 1092‑1
Face‑to‑Face EN 558 Series 1, ASME B16.10, API 623
Flange Connections EN 1092‑1 PN40, ASME B16.5 Class 300 (as specified)
Inspection & Testing API 598, ISO 5208, EN 12266‑1

Testing:

  • Shell strength test: 1.5 × rated pressure

  • High‑pressure seat test: 1.1 × rated pressure

  • Low‑pressure seat test: 0.6 MPa (bubble‑tight for soft seat)

7. Installation Considerations

  1. Flow Direction

    • Globe valves are typically installed with flow entering below the disc (flow‑to‑open or flow‑to‑close) depending on design.

    • Flow direction arrow on the body must be followed to ensure proper sealing and performance.

  2. Orientation

    • Can be installed in horizontal or vertical pipelines with the stem upright.

    • Avoid installation with stem inverted to prevent debris accumulation.

  3. Maintenance

    • Soft seat inserts can be replaced without removing the valve from the pipeline (with bolted bonnet design).

8. Optional Features

Option Description
Bellows Seal Prevents stem leakage, ideal for hazardous or toxic media
Stellite® Hardfaced Seat/Disc For high‑temperature or abrasive services
Gear Operator For larger sizes or higher pressure applications
Pneumatic / Electric Actuator For automated control systems
NACE Compliance MR0175 / MR0103 for sour service
Low‑Emission Packing ISO 15848 / API 624 certified

9. Ordering Information

Please specify the following when placing an order:

  1. Size, pressure rating, and end connection

  2. Media and operating temperature — determines seat and packing materials

  3. Body and trim materials — carbon steel, stainless steel, etc.

  4. Seat type — PTFE soft seat (standard) or metal seat (optional)

  5. Stem type — rising stem (OS&Y) or non‑rising stem

  6. Flange standard — EN 1092‑1 / ASME B16.5

  7. Actuation type — handwheel, gear, pneumatic, electric

  8. Special requirements — bellows seal, NACE, low emission, material test reports (EN 10204 3.1), etc.

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