Description

Technical Data Sheet – Wafer-Type Floating Ball Valve

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1. Product Overview

• Product Name: Wafer-Type Floating Ball Valve

• Valve Type: Floating Ball Valve (2-Piece or 3-Piece Body)

• Design Standard: API 608 / ASME B16.34 / BS 5351

• Size Range: 1/2″ to 6″ (DN15 to DN150)

• Pressure Class: Class 150 / Class 300 (PN16 / PN40)

• Body Material: Cast Steel (WCB, CF8, CF8M) / Forged Steel (A105, F304, F316)

• Ball Material: Stainless Steel (AISI 304 / 316) with Hard Chrome Plating

• Seat Material: PTFE / RPTFE / PEEK / Nylon

• Operation: Lever Handle / Gear Operator / Actuator Mounting Pad

• Connection Type: Wafer-Type (Between Flanges) per ASME B16.5 or EN 1092-1

• Application: Water, Oil, Gas, Chemical, HVAC, General Industrial

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2. Applicable Standards & Specifications

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3. Technical Parameters

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4. Wafer-Type Design Features

4.1 Body Configuration

• Compact Design: Wafer-style body fits between two flanges without additional studs, reducing weight and cost

• Centering Lugs: Provides precise alignment between pipeline flanges and prevents valve movement during operation

• Bolted Construction: 2-piece or 3-piece body allows easy access for maintenance and seat replacement

• Reduced Face-to-Face: Shorter installation length compared to flanged valves (per API 608 short pattern)

4.2 Floating Ball Principle

• Pressure-Assisted Sealing: Line pressure forces the floating ball against the downstream seat, creating bubble-tight shut-off

• Self-Adjusting: Ball moves slightly to compensate for seat wear and pressure variations

• Low Torque: Optimized ball surface finish and seat material selection minimize operating torque

4.3 Installation Advantages

• Lightweight: Significantly lighter than flanged ball valves

• Cost-Effective: Reduced material and machining costs

• Universal Fit: Compatible with ASME B16.5 Class 150/300 or EN 1092-1 PN16/PN40 flanges

• Space Saving: Ideal for tight installation spaces

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5. Main Materials of Parts

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6. Seat Material Selection Guide

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7. Dimensional Data (Wafer-Type, Class 150 / PN16)

Note: Dimensions are for reference only based on typical API 608 short pattern. Final dimensions to be confirmed with manufacturer’s drawing.

Class 300 / PN40 Dimensions

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8. Flow Characteristics (Cv Values – Typical)

Cv values are approximate and may vary by manufacturer.

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9. Design Features

9.1 Blowout-Proof Stem

• Stem is inserted from inside the body with integral shoulder

• Prevents stem ejection under pressure even if gland nut is removed

9.2 Anti-Static Device (Optional)

• Spring-loaded ball/plunger between stem and ball

• Ensures electrical continuity across valve to dissipate static charge

9.3 Fire-Safe Design (Optional)

• Meets API 607 / ISO 10497 requirements

• Secondary metal-to-metal sealing after seat burnout

9.4 Locking Device

• Lever handle includes holes for padlock

• Prevents unauthorized operation

9.5 Mounting Pad (ISO 5211)

• Top flange drilled and tapped per ISO 5211 for direct actuator mounting

• Available on all sizes for automation

9.6 Cavity Pressure Relief

• Automatic relief of body cavity pressure to upstream side (for uni-directional designs)

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10. Inspection & Testing

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11. Applications

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12. Installation Guidelines

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13. Ordering Information

When ordering, please specify:

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Remarks:

• Wafer-type ball valves are not recommended for dead-end service unless specified with special retention features.

• For vacuum service, consult manufacturer for seat material selection.

• For actuated valves, torque data must be provided for proper actuator sizing.

• Face-to-face dimensions may vary between manufacturers – verify before ordering replacement valves.

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This data sheet is for reference only. All specifications are subject to final confirmation by the manufacturer based on specific service conditions and applicable standards.