Globe Valve Pneumatic Actuated-DN25 PN25 RF

Description

Pneumatic Actuated Globe Valve – DN25 PN25 RF, A105 Forged Steel Body

Model: GGV-PA-DN25-PN25-A105
Product Description: Pneumatically actuated, bolted bonnet, outside screw and yoke (OS&Y) globe valve with raised face flanges. The forged carbon steel body (ASTM A105N) and hardfaced trim, combined with a double-acting or spring-return pneumatic actuator, provide reliable remote on/off or modulating control for high-pressure and high-temperature industrial applications.

1. Main Design Codes and Standards

Item	Standard / Code
Valve Design	ASME B16.34, API 602 (forgings)
Face-to-Face	EN 558 Series 1 (160 mm) / ASME B16.10 (optional)
Flanged Ends	EN 1092-1 PN25, Raised Face (RF) Type B1
Pressure-Temperature Ratings	ASME B16.34, Material Group 1.1 (A105)
Testing & Inspection	API 598, ISO 5208
Actuator Mounting	ISO 5211 top flange
Fugitive Emissions (optional)	ISO 15848-1
Safety Integrity Level (optional)	IEC 61508 SIL 2 / SIL 3

2. Main Technical Parameters

Parameter	Specification
Nominal Size	DN25 (1″)
Pressure Class	PN25 (Class 150 equivalent)
End Connection	Flanged RF, EN 1092-1 PN25 (mates with ASME B16.5 Class 150)
Body Construction	Bolted bonnet, OS&Y, rising stem, outside screw
Disc Type	Plug disc, guided
Seating Surfaces	Stellite Gr.6 hardfaced (disc and integral or renewable seat ring)
Flow Direction	“Low inlet” – flow under disc (standard)
Operation	Pneumatic actuator (standard), manual handwheel override optional
Fail-Safe Mode	Fail-Close (spring-return, air to open) or Fail-Open (air to close)

3. Pressure-Temperature Ratings (ASME B16.34 Group 1.1 – A105, PN25)

Temperature (°C)	Max. Working Pressure (bar)	Approx. psi
-29 to 38	25.9	375
100	24.5	355
200	23.3	338
300	22.0	319
400	20.6	299
425	20.0	290
450	18.4	267
500	15.5	225

Note: A105N is suitable for continuous operation up to 425 °C. For higher temperatures, intermittent service may apply. Graphite packing allows full rating to 500 °C.

4. Materials of Main Parts

No.	Part Name	Material	Remarks
1	Body	ASTM A105N	Forged carbon steel, normalized
2	Bonnet	ASTM A105N	Bolted design
3	Disc (Plug)	ASTM A105N	Stellite Gr.6 hardfaced seating face
4	Seat Ring	ASTM A105N + Stellite Gr.6 overlay	Renewable, threaded or welded-in
5	Stem	ASTM A276 Type 410 (13Cr) or A182 F6a	Polished, backseat shoulder
6	Packing	Graphite with SS316 wire reinforcement	High-temperature, low emission
7	Bonnet Gasket	SS304/Graphite spiral wound	With inner and outer rings
8	Gland / Gland Flange	Carbon Steel / AISI 410
9	Yoke	Carbon Steel (A216 WCB or fabricated)	Integral or bolted
10	Bolting	ASTM A193 B7 / A194 2H	High-strength alloy steel
11	Handwheel (manual override)	Ductile Iron / Carbon Steel	Optional declutchable gear

5. Dimensions & Weight – DN25 PN25 RF (Valve Only, No Actuator)

Parameter	Dimension (mm)	Remarks
Face-to-Face (L)	160	EN 558 Series 1 (standard)
Centre to Top (H1 – stem top)	Approx. 195	Stem top to mounting flange
Valve Height with Manual Handwheel	Approx. 250	Without actuator
Flange Outside Diameter (D)	115	EN 1092-1 PN25
Bolt Circle / Holes	85 mm, 4× M12
Approx. Valve Weight	5.5 kg	Without actuator

For overall dimensions with actuator, refer to the actuator section or certified outline drawings.

6. Pneumatic Actuator Specifications

Parameter	Specification
Actuator Type	Double-acting or Spring-return (rack & pinion or scotch yoke)
Air Supply Pressure	4 – 6 bar (standard)
Fail-Safe Action	Fail-Close (spring closes on air loss) or Fail-Open
Actuator Sizing	Selected for min. 1.5 × safety factor on valve torque
Operating Temperature	Standard: -20 °C to +80 °C; low/high temp options available
Coating	Epoxy coated aluminum or hard anodized
ISO 5211 Mounting	F05/F07 size (typical)
Stem Coupling	11 mm square / Ø14 keyed (direct mount)
Approx. Actuator Height (incl. bracket)	230 mm (Fail-Close), 200 mm (Double-acting)
Approx. Total Weight (valve + actuator)	9 – 11 kg

Standard Control Accessories (optional):

4–20 mA smart positioner (HART, Fieldbus capable)
NAMUR solenoid valve (3/2 or 5/2), ATEX/IECEx
Limit switch box (mechanical/proximity/inductive)
Manual override (declutchable handwheel or lever)
Air filter regulator

7. Performance Testing

Test Item	Test Medium	Test Pressure	Acceptance Criteria
Shell Hydrostatic	Water	38.8 bar (1.5 × max. rated at 38 °C)	No visible leakage or deformation
High-Pressure Seat Test	Water	28.5 bar (1.1 × max. rated)	API 598 Rate A (metal-seated)
Low-Pressure Seat Test	Air / Nitrogen	6 bar (87 psi)	Leakage rate per API 598
Backseat Test	Water	28.5 bar	No leakage at packing
Actuator Functional	Air at 4 bar	–	Full stroke, no sticking; fail-safe action verified
Fugitive Emissions (opt.)	Helium	–	ISO 15848-1 Class BH

8. Design Features

Forged A105N Body: Open die forged construction ensures structural integrity for high-pressure service and eliminates casting defects.
Stellite Hardfaced Trim: Both disc and seat are surfaced with Stellite Gr.6 for excellent wear, galling, and erosion resistance, extending service life.
OS&Y with Backseat: The rising stem and outside screw provide clear position indication; backseat protects packing when valve is fully open.
Pneumatic Fail-Safe Operation: Spring-return actuator provides automatic closure (or opening) on loss of air supply, essential for safety-critical applications.
Low-Emission Packing: Live-loaded graphite packing system can be tuned for fugitive emission compliance.
Direct ISO 5211 Mounting: Actuator bracket and coupling are matched to the valve stem for reliable, backlash-free operation.
Guided Plug Disc: Ensures accurate alignment with the seat, reducing vibration and enabling throttling service.

9. Application Scope

Suitable Media: High-pressure steam, boiler feedwater, thermal oils, hydrocarbons, and non-corrosive gases compatible with carbon steel.
Temperature Range: -29 °C to +425 °C (continuous), up to +500 °C intermittent. Actuator ambient temperature range typically -20 °C to +80 °C (extended ranges available with special seals).
Industries: Power generation, petrochemical, oil & gas, district heating, chemical injection, and remote high-pressure isolation/modulating loops.
Key Advantages:
- Pneumatic actuation enables remote control and integration into process automation systems.
- Robust forged construction handles pressure shocks and high differential pressures.
- Stellite trim allows service in both isolation and throttling duties with minimal wear.

10. Optional Configurations & Accessories

Body Material Upgrades: ASTM A182 F304/F316, Duplex SS, A182 F22 for high-temperature.
Trim Materials: Stellite Gr.12, Tungsten Carbide, Monel, Inconel 625.
Seat Type: Soft PTFE or PEEK insert for zero-leakage gas service (limited temperature).
End Connections: Butt Weld (BW), Socket Weld (SW), or NPT threaded.
Extended Bonnet: For cryogenic or high-temperature insulation.
Live-Loaded Packing: Belleville spring stack maintains constant gland load.
Actuator Upgrades: High-temperature seals (up to 120 °C), stainless steel actuator housing for corrosive atmospheres.
Control Package: Full automation with positioner, solenoid, limit switches wired and tested.

11. Ordering Information

When ordering, specify:

Model: GGV-PA-DN25-PN25-A105
Body Material: ASTM A105N
Nominal Size: DN25
Pressure Class: PN25
End Connection: Flanged RF (EN 1092-1 or ASME B16.5 Class 150)
Actuator Action: Fail-Close (Air-to-Open) or Fail-Open (Air-to-Close)
Air Supply Pressure: [e.g., 6 bar]
Accessories Required: [e.g., Positioner, Solenoid, Limit Switch, Filter Regulator]
Service Medium & Temperature
Optional Certifications: NACE, Fire-Safe, Fugitive Emission, SIL

Disclaimer: This technical data sheet is for reference and selection purposes only. All exact dimensions, ratings, actuator sizing, and material certifications must be confirmed against the manufacturer’s certified documentation and approved drawings before procurement or installation.