DN25-PN25-SW Top Entry Floating Ball Valve
DN25-PN25-SW Top Entry Floating Ball Valve - Image 2
DN25-PN25-SW Top Entry Floating Ball Valve - Image 3
DN25-PN25-SW Top Entry Floating Ball Valve - Image 4

DN25-PN25-SW Top Entry Floating Ball Valve

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Description

TECHNICAL DATA SHEET

Product Name: DN25 PN25 Top Entry Floating Ball Valve
Model/Specification: DN25-PN25-TOPENTRY-FLOAT
Valve Type: Top Entry Floating Ball Valve
Connection Type: Flanged (RF) / Butt Weld (BW) / Threaded (NPT) User specified

1. Basic Design Parameters

Parameter Standard/Specification
Size DN25 (1 inch)
Pressure Class PN25 (25 bar / 360 PSI)
Body Material Forged Stainless Steel (ASTM A182 F304/F316) / Forged Carbon Steel (A105) User specified
Manufacturing Process Forged Steel / Cast Steel (depending on manufacturer)
Design Standard API 608 / API 6D / ISO 17292 / ASME B16.34
End Connection Standard EN 1092-1 (Flanged) / ASME B16.25 (BW) / ASME B1.20.1 (NPT)
Face to Face Standard EN 558-1 / ISO 5752 / API 6D / ASME B16.10
Test & Inspection Std. API 598 / EN 12266-1 / ISO 5208
Fire-Safe Design API 607 / ISO 10497 (Optional)
Fugitive Emission ISO 15848-1 (Optional)

2. Technical Specifications

Parameter Details
Valve Type Top Entry Floating Ball Valve
Body Type One-Piece Body with Top Removable Cover
Bonnet Type Top Flanged Cover / Bolted Bonnet
Bore Type Full Bore / Reduced Bore (Optional)
Ball Type Floating Ball (pressure-assisted sealing)
Seat Type Soft Seat (RPTFE / PTFE / PEEK) – Self-relieving design
Sealing Principle Upstream sealing – ball floats against downstream seat under pressure
Applicable Media Water, Oil, Gas, Steam, Corrosive Fluids (depending on material)
Temperature Range -29°C to +200°C (PTFE/RPTFE seats) / -29°C to +300°C (PEEK seats)
Operation Lever Handle / Gearbox / Actuator
Anti-Static Device API 608 / API 6D Requirement (Standard) – Spring-loaded ball between ball and stem
Blow-Out Proof Stem Standard
Cavity Pressure Relief Self-relieving seat design (automatic pressure relief in ball cavity)
ISO Mounting Pad ISO 5211 standard mounting for actuator

3. Material of Construction (Recommended – Stainless Steel)

Part Name Material Standard/Grade
Body Stainless Steel ASTM A182 F304 / F316 (Forged) or A351 CF8/CF8M (Cast)
Top Cover / Bonnet Stainless Steel ASTM A182 F304 / F316
Ball Stainless Steel (Hardened) ASTM A182 F304 / F316 (Chrome plated optional)
Stem Stainless Steel ASTM A182 F304 / F316 / 17-4PH
Seat Rings Reinforced PTFE / RPTFE / PEEK Virgin PTFE / Glass-filled PTFE
Body Gasket Spiral Wound / Reinforced Stainless Steel + Graphite / PTFE
Stem Seals / Packing PTFE / RPTFE / Graphite Low emission, fire-safe grade
Thrust Bearings PTFE + Stainless Steel Self-lubricating
Anti-Static Device Stainless Steel Ball + Spring 316 SS
Body Bolts/Nuts Stainless Steel ASTM A193 B8 / A194 8
Handle / Lever Stainless Steel With locking device

*For Carbon Steel version (A105): body/bonnet to A105, bolting to A193 B7 / A194 2H.*

4. Main Dimensions & Connection Details

*Note: Dimensions for DN25 PN25 Top Entry Floating Ball Valve with Flanged Ends (RF). Based on EN 558-1 and industry standards.*

4.1 End-to-End Dimensions (Face-to-Face)

Size Pressure Class L (mm) L (in) H (mm) H (in) W (Handle mm) Weight (kg) Weight (lbs)
DN25 PN25 150-160 5.9-6.3 ~120 ~4.7 ~160 ~4-6 ~8.8-13.2

Note: Top entry design adds slightly to overall height compared to side entry valves. Weight varies by manufacturer and material selection.

4.2 Flange Details (Per EN 1092-1 – Type 11 / PN25)

Parameter DN25 Flange
Flange Outside Diameter (D) 115 mm
Bolt Circle Diameter (PCD / k) 85 mm
Number of Bolt Holes 4
Bolt Hole Diameter (d2) 14 mm
Bolt Thread Size M12
Raised Face Height 2 mm
Flange Thickness (C) 16 mm

4.3 End Preparation (Alternative Connections)

Connection Type Standard Details
Threaded (NPT) ASME B1.20.1 1″ NPT Female
Butt Weld (BW) ASME B16.25 Bevel prepared ends
Socket Weld (SW) ASME B16.11 1″ Socket Weld per standard

5. Pressure-Temperature Rating

*Material Group: Stainless Steel (A182 F304/F316) with PTFE/RPTFE Seats *

Temperature (°C) Working Pressure (bar) Working Pressure (psi) Notes
-29 to 38 25 360 Maximum Rating (PN25)
50 24 348
100 22 319
150 19 275 Max for standard PTFE
200 16 232 With RPTFE / PEEK seats
250 14 203 With PEEK seats
300 11 160 With PEEK seats

For Carbon Steel (A105): similar ratings up to 425°C with derating.

6. Test Pressure (API 598 / EN 12266-1)

Test Type Medium Pressure (bar) Pressure (psi) Acceptance Criteria
Shell Test (Hydrostatic) Water 38 551 1.5 x PN (no visible leakage)
High-Pressure Seat Test Water 27.5 399 1.1 x PN (Zero leakage – soft seats)
Low-Pressure Seat Test Air / N2 5.5 – 6.0 80 – 87 Bubble-tight

7. Flow Characteristics (DN25 – Full Bore)

Parameter Value
Port Diameter (Full Bore) ~25 mm (0.98 in) (typical)
Flow Coefficient Cv (approx) ~30 – 40 (typical for 1″ full bore ball valve)
Flow Coefficient Kv (approx) ~26 – 35
Flow Characteristic Quick Opening (On-Off)
Shut-off Class API 598 / ISO 5208 Rate A (Zero Leakage)

8. Top Entry Design Advantages

Feature Benefit
In-Line Maintenance Valve internals (ball, seats, stem) can be removed through top cover without removing valve body from pipeline
One-Piece Body Eliminates body joint leak paths (unlike 2-piece or 3-piece designs)
Reduced Downtime Maintenance performed without disturbing pipe connections
Lower Lifecycle Cost Easier repair and seat replacement
Compact Design Shorter face-to-face compared to side entry designs
Ideal for Welded Systems Perfect for welded pipelines where valve removal is difficult

9. Features & Applications

  • Key Features:

    • Top Entry Design: Allows complete in-line access to valve internals for maintenance without removing the valve body from the pipeline – reduces downtime and maintenance costs .

    • Floating Ball Design: Ball floats against downstream seat under pressure, providing tight, leak-proof sealing .

    • One-Piece Body Construction: Eliminates potential leak paths at body joints, providing maximum integrity .

    • Fire-Safe Design: Optional API 607 certification ensures sealing integrity in case of fire .

    • Anti-Static Device: Ensures electrical continuity across the valve to prevent spark ignition in flammable services .

    • Blow-out Proof Stem: Stem is retained within the valve body even if the gland is removed under pressure .

    • ISO 5211 Mounting Pad: Standardized mounting for easy actuator installation .

    • Self-Relieving Seats: Prevents over-pressure in the ball cavity due to thermal expansion .

    • Full Bore Design: Minimal pressure drop and easy pigging capability .

    • Lockable Handle: Provides safety lockout capability for maintenance .

    • Bidirectional Sealing: Suitable for flow in either direction .

    • Corrosion Protection: ASTM A961 coating standard .

  • Main Applications:

    • Chemical Processing: Handling corrosive fluids where in-line maintenance is beneficial .

    • Petrochemical Plants: Hydrocarbon processing, solvent handling .

    • Pharmaceutical Industry: Sanitary applications requiring easy cleaning .

    • Oil & Gas Production: Gathering systems, metering skids .

    • Power Plants: Cooling water, auxiliary systems .

    • Water Treatment: Filtration and treatment plants .

    • Food & Beverage: Processing lines requiring frequent cleaning .

    • Marine Industry: Seawater systems .

    • Welded Pipeline Systems: Where valve removal is impractical .

10. Top Entry vs. Side Entry Comparison (DN25)

Parameter Top Entry Side Entry (2-Piece / 3-Piece)
In-Line Maintenance Yes – remove top cover only No – must remove valve from line
Body Joints One (top cover) Two or more (body joints)
Leak Paths Minimal More potential leak paths
Weight Slightly heavier Lighter
Cost Higher initial cost Lower initial cost
Lifecycle Cost Lower (easier maintenance) Higher (difficult maintenance)
Ideal Application Welded systems, critical service General purpose, accessible piping

11. Ordering Information

Please specify when ordering:

  1. Valve size: DN25 (1″)

  2. Pressure class: PN25

  3. Body material: F304 / F316 / A105

  4. End connections: Flanged RF / BW / NPT

  5. Seat material: PTFE / RPTFE / PEEK

  6. Operation: Lever handle / Gearbox / Actuator

  7. Special requirements: Fire-safe (API 607), NACE, oxygen cleaning, cryogenic service, etc.

  8. Accessories: Locking device, extension stem, position indicator

*Disclaimer: The above data is prepared based on common industry standards (API 608, API 6D, EN 1092-1, API 598) for top entry floating ball valves . The top entry design provides significant maintenance advantages for critical and welded pipeline applications. Specific dimensions, materials, and pressure ratings may vary by manufacturer. The final technical agreement and certified drawings shall prevail.*

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