Overview

The document provides detailed technical specifications, materials, dimensions, performance data, and installation guidelines for the EBRO wafer type check valve, model RSK. This valve is designed for use in various industrial fluid control applications, supporting nominal diameters from DN 32 to DN 600.

Technical Specifications

• Nominal Diameter Range: DN 32 to DN 600
• Face-to-Face Length: EBRO factory standard
• Flange Connection: Compliant with DIN 2632/33 PN 10/16, EN 1092 PN10/16, and ASME Class 150
• Marking: According to DIN EN 19
• Leakage Testing Standards: EN 12266 (Leakage Rate A for soft seals, Rate G for metal seals), ISO 5208 Category 3, API 598 Table 5, ANSI B 16-104 Class VI
• Temperature Range: 0°C to +200°C depending on sealing and body materials:
  • NBR: up to 90°C
  • EPDM: up to 120°C
  • FPM (FKM): up to 150°C
  • PTFE: up to 200°C
• Pressure Range: Maximum 8 bar for plastic versions, up to 16 bar for metal versions (dependent on size and material)

Materials

• Body Materials: Aluminium, Stainless Steel (1.4305, 1.4571), Brass (Rg 7), PVC, PP, PVDF, Steel (nickel plated), Hastelloy C4, Aluminum bronze
• Disc Materials: Stainless Steel (1.4305, 1.4571, 1.4581), PVC, PP, PVDF, Hastelloy C4, Aluminum bronze
• Sealing Materials: NBR, EPDM, FPM, PTFE
• Fasteners: Stainless Steel (1.4305, 1.4571), Brass (Rg 7)
• Special materials available on customer request

Design Features

• Universal application suitable for vertical and horizontal installation
• Centering via the outer diameter of the valve body
• Sealing achieved through O-rings
• Holder eye for easy installation and centering
• Extremely short face-to-face length for compact installation
• Interchangeable materials among components
• Available with spring return mechanism for pulsating flow conditions
• Maintenance-free and simple to install

Dimensions and Weights

The document provides detailed dimensional tables for valve sizes DN 32 to DN 600, including parameters A, B, C, D, L, and weights for plastic and metal versions. For example:

• DN 32 (1¼ inch): A=35 mm, B=40 mm, C=50 mm, D=80 mm, L=45 mm, Weight plastic ~0.1 kg, metal ~0.5 kg
• DN 300 (12 inch): A=280 mm, B=315 mm, C=337 mm, D=385 mm, L=250 mm, Weight plastic ~3.5 kg, metal ~23 kg

Additional dimensions are provided for versions with and without spring return and manual emergency switches.

Performance Data

• Kv Values (Flow Coefficients): Provided for each nominal size, indicating flow capacity in m³/h for water at 20°C. For example, DN 32 has Kv ~16.2 m³/h.
• Pressure Loss: Pressure loss diagrams show loss in bar relative to flow volume, differentiating between plastic and metal versions.
• Minimum Opening Pressure: Typically 1-4 mbar without spring, slightly higher with spring (approx. 20 mbar increase for plastic versions).
• Tightness: Requires minimum back pressure of 0.3 bar to maintain tight sealing.

Installation Recommendations

• When installing the check valve on top of a pump, avoid mounting directly on the pump flange.
• Ensure a smoothing section of at least 5 times the nominal diameter (5xDN) between the pump and valve or any bends to prevent flow disturbances.

Additional Notes

• All technical data are subject to change without notice.
• Special materials and configurations can be provided upon customer request.
• Spring return versions are recommended for pulsating flow conditions to ensure valve reliability.