4″ 150LB Hypalon Fully Lined Diaphragm Valve

Flow Path Design Straight-Through (Non-Weir) ∙ Bore: 85–90% of nominal pipe ID
Size Range DN50 to DN200 (2″ to 8″)
End Connections • Flanged (EN 1092-1 Type A) ∙ ANSI Class 150
• Optional: Lug/Wafer
Flow Coefficient DN100 (4″): Cv ≈ 120 (vs. 180 for full-bore)
Pressure Drop ΔP ≈ 0.3–0.8 bar (water, 2 m/s flow)
Actuation Manual Handwheel ∙ Pneumatic (Spring-Return) ∙ Electric (On/Off)
Certifications PED 2014/68/EU (Cat. II) ∙ ISO 9001 ∙ EN 10204 3.1

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Description

Straight-Through Diaphragm Valve Technical Datasheet

(Non-Weir, Reduced-Bore Design)
Compliance: BS5156 ∙ 材料: Ductile Iron + Full EPDM Lining

Component	Material & Specification	Key Properties
1. Valve Body	Ductile Iron (EN-GJS-400-18/GGG40) • Full Internal Lining: EPDM (3 mm min. thickness)	• Pressure Rating: PN10/PN16 • Lining Adhesion: ≥ 5 MPa (ISO 4624) • Corrosion Protection: Full EPDM barrier
2. Disc	Ductile Iron (GGG40) • EPDM-Encapsulated	• Reduced-Bore Design: 85–90% of pipe ID • Abrasion-Resistant Surface
3. Stem	AISI 316L Stainless Steel • Mechanically Polished (Ra ≤ 1.6 μm)	• SSC-Resistant (NACE MR0175) • Hardness: 140–180 HB
4. Diaphragm	Hypalon • Polyester Fabric Core	• Temp Range: -20°C to +130°C • Cycle Life: ≥ 50,000 cycles
5. Bonnet	Ductile Iron + Full EPDM Lining	• Bolted Design (EPDM-Coated Bolts)
6. Seals	EPDM O-Rings/Gaskets	• Bubble-Tight Shutoff (ISO 5208 Rate A)

Critical Technical Data

パラメータ	仕様
Flow Path Design	Straight-Through (Non-Weir) ∙ Bore: 85–90% of nominal pipe ID
Size Range	DN50 to DN200 (2″ to 8″)
End Connections	• Flanged (EN 1092-1 Type A) ∙ ANSI Class 150 • Optional: Lug/Wafer
Flow Coefficient	DN100 (4″): Cv ≈ 120 (vs. 180 for full-bore)
Pressure Drop	ΔP ≈ 0.3–0.8 bar (water, 2 m/s flow)
アクチュエーション	Manual Handwheel ∙ Pneumatic (Spring-Return) ∙ Electric (On/Off)
Certifications	PED 2014/68/EU (Cat. II) ∙ ISO 9001 ∙ EN 10204 3.1

Straight-Through vs. Full Bore: Key Differences

Feature	Straight-Through Valve	Full-Bore Valve
Bore Diameter	85–95% of pipe ID	100% of pipe ID
Flow Efficiency	Moderate (Cv ≈ 65% of full-bore)	Maximum (No restriction)
Slurry Handling	Good (Less clogging than weir-type)	Excellent (Zero clogging risk)
Mechanical Strength	Higher (Thicker walls due to reduced bore)	Lower (Thinner walls to match pipe ID)
Cost	Lower (Less material)	Higher

Design Advantages of Straight-Through Configuration

Optimized for Slurries & Viscous Fluids

Smooth, obstruction-free flow path prevents particle buildup (e.g., wastewater sludge, pulp).

Robust Pressure Containment

Thicker ductile iron walls (enabled by reduced bore) withstand surge pressures up to 1.5×PN.

Simplified Maintenance

Top-entry diaphragm replacement (no pipe disassembly).

Cost-Effective Corrosion Protection

Full EPDM lining isolates ductile iron from corrosive media (pH 3–12).

Limitations & Design Notes

Not Pigable: Reduced bore prevents pipeline pigging.
Chemical Limits: EPDM incompatible with oils, aromatics, concentrated acids (>20% H₂SO₄).
温度: Max. 130°C (EPDM) – derate pressure above 80°C.
Actuator Sizing: Higher torque required vs. weir-type due to larger diaphragm area.

保証:

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