- Brand: Gestra (Flowserve)
- Model: RK 86A Series (Disdisco / Wafer Pattern Non-Return Check Valve)
- Type: Spring-Loaded Wafer Check Valve
- Part Number / Size Spec: RK 86A - 2 1/2" - DN 65 - PN 40
Technical Specs:
- Core Application: Prevention of backflow in steam, condensate, hot water, gas, and non-aggressive fluid systems.
- Nominal Size: DN 65 (2.5 inches)
- Nominal Pressure Rating: PN 40 / Class 300
- Valve Pattern: Compact wafer design with short overall face-to-face dimensions conforming to EN 558-1, Series 49
- Sealing Mechanism: Metal-to-metal precision-ground valve disk and seat interface
- Maximum Operational Pressure: Up to 40 bar at ambient conditions
- Operational Temperature Bounds: -200°C to +550°C for all-metal design
- Standard Opening Pressure (Cracking Pressure):
- Vertical upward flow: approx. 20 mbar
- Horizontal flow: approx. 10 mbar
- Vertical downward flow: approx. 5 mbar
- Valve Body Material: Austenitic Stainless Steel 1.4408 (CF8M)
- Disc & Internal Components Material: Stainless Steel 1.4571 (AISI 316Ti) / 1.4404
- Closing Spring Material: Heavy-duty Stainless Steel 1.4571 (AISI 316Ti)
- Process Connection: Sandwich-type installation clamped between pipe flanges (EN 1092-1 / ASME B16.5)
- Centering / Alignment: Integrated centering ring guide body for exact coaxial alignment inside flange bolt circles
- Enclosure / Pressure Integrity: PED 2014/68/EU compliant, CE marked, and tested conforming to EN 12266-1
Weight: 2.5 kg
Dimensions: 135 diam. x 45 mm
Country of Origin: Germany
HS Code: 8481.30.91