C95800 dual disc check valve

1. Sealing System
o Pure FKM (Viton®) seats bonded directly to C95800 discs
o Zero metal sealing components – eliminates galling risk
o Leakage rate: ≤ 0.01 ml/min per inch seat dia. (Class VI)
2. Simplified Disc Design
o No Stellite hardfacing – cost-optimized for non-abrasive services
o Disc surface: Machined to Ra 3.2 μm for optimal rubber adhesion
3. Standard Hinge Mechanism
o No torsion springs (non-slam feature removed)
o Gravity-assisted closing (vertical installation required for optimal performance)

DUAL PLATE WAFER CHECK VALVE | PN16 | SOFT SEAT DESIGN

PARAMETER	SPECIFICATION	NOTES
Valve Type	Dual Plate Check Valve	Standard design (no anti-slam)
Design Standard	API 594 / ASME B16.34	Wafer type per Annex A
Size Range	DN 50 to DN 1200 (2" to 48")	Full bore (100% port)
Pressure Rating	PN16 (16 bar @ 120°C)
End Connection	RF Flanges per EN 1092-1	Face-to-face: EN 558-20
Body Material	ASTM B148 C95800 (Ni-Al Bronze)	UNS C95800
Disc Material	ASTM B148 C95800 (No hardfacing)	As-cast surface finish Ra ≤ 3.2 μm
Shaft Material	Monel K500 (UNS N05500)	Solution-treated & aged
Seat Material	Full Fluororubber (FKM)	Viton® FKM-75, bonded to disc
Spring Material	Monel K500
Hinge Bushings	Self-lubricating bronze	Maintenance-free
Temperature Range	Standard: -20°C to +150°C	Seat limit: -29°C to +200°C (short term)
Flow Direction	Horizontal / Vertical upflow
Hydrostatic Test Press	24 bar (1.5 × PN16) per EN 12266-1
Seat Leakage Class	API 598 Class VI (Soft seat)	Bubble-tight shutoff
Cracking Pressure	≤ 0.1 bar
Flow Coefficient (Kvs)	2800 (for DN150 valve)	Higher vs. metal-seat designs
Max Flow Velocity	8 m/s
Seal Configuration	Elastomer-to-Body Direct Sealing	No metal-to-metal contact
Certifications	• PED 2014/68/EU Cat. II • WRAS	Material Certs: EN 10204 3.1

KEY UPDATES & FEATURES

Sealing System
- Pure FKM (Viton®) seats bonded directly to C95800 discs
- Zero metal sealing components – eliminates galling risk
- Leakage rate: ≤ 0.01 ml/min per inch seat dia. (Class VI)
Simplified Disc Design
- No Stellite hardfacing – cost-optimized for non-abrasive services
- Disc surface: Machined to Ra 3.2 μm for optimal rubber adhesion
Standard Hinge Mechanism
- No torsion springs (non-slam feature removed)
- Gravity-assisted closing (vertical installation required for optimal performance)

PERFORMANCE DATA

Characteristic	Value
Cycle Life (Water)	>50,000 cycles
Max Backpressure Resistance	25 bar (PN16 × 1.56)
Chemical Compatibility	Water, oils, H₂S ≤2000 ppm, weak acids (pH>4)
Installation Angle Limit	Vertical: 0°±10° Horizontal: ±3° level

MATERIAL SPECIFICS

Fluororubber Seats (Viton® FKM-75):

Hardness: 75 Shore A
Compression Set: ≤15% (70h @ 200°C per ASTM D395)
Fluid Resistance: Swell ≤10% in ASTM Oil #3 @ 150°C

Disc (C95800 without hardfacing):

Max Surface Pressure: 50 MPa (with FKM seat)
Surface Finish: CNC-machined to Ra ≤3.2 μm

COMPLIANCE & APPLICATIONS

Standards:

API 594 (Dimensional/Testing)
ISO 5208 (Leakage Testing)
WRAS (Water Supply Regulations)

Typical Services:

Cooling water systems
Hydraulic oil return lines
Low-abrasion chemical transfer (e.g., glycol, solvents)
Potable water distribution

OPTIONAL FEATURES

▢ EPDM Seats (for ozone/steam resistance)
▢ Disc Protection Coatings (e.g., Xylan® for sticky media)
▢ Position Indicator
▢ PTFE Hinge Bushings (extended chemical resistance)

GUATANTEE

SAVVY VALVES is committed to delivering exceptional product quality and worry-free after-sales service. Our valves are guaranteed to provide a minimum service life of 12 months, during which we will supply all necessary spare parts and detailed maintenance instructions free of charge. Within the warranty period, if any non-human-induced damage occurs, we will replace components at no cost and provide professional technical support. After the warranty expires, customers only need to pay for the cost of spare parts, while still benefiting from discounted maintenance services. Our goal is to help clients reduce operational costs and enhance production efficiency through reliable quality and comprehensive after-sales support. Whether for technical inquiries or maintenance needs, our expert team will respond promptly to ensure your valve system maintains optimal performance at all times.

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