Overview

This document is a technical catalog for the 39&-8 series of true union spring check valves, including high-pressure and large bore models. It provides detailed specifications, installation instructions, material descriptions, and operational guidelines for these valves used primarily in water treatment, HVAC, and pool applications.

1. Product Description and Application

• The 39&-8 check valve is designed for applications requiring pressure closure and minimal movement.
• Suitable for water treatment plants, HVAC systems, and pools.
• Available in true union design for easy maintenance and replacement.
• Models include high-pressure and large bore variants.

2. Technical Specifications

• Valve sizes range from DN 15 (3/8 inch) to DN 110 (4 inches).
• Materials include 39&-8 for nuts and plugs, stainless steel springs, EPDM or FKM seals, and various plastics and metals for bodies and internal components.
• Pressure ratings and flow coefficients (Kv) are provided for each size and seal type.
• Valve components are corrosion-resistant and suitable for potable water.

3. Installation Guidelines

• Install vertically or horizontally with flow direction indicated by arrow on valve body.
• Ensure proper orientation to avoid damage and ensure correct operation.
• Use appropriate sealing materials and torque values as specified.
• Compatible with standard piping sizes and connections (ISO, ANSI).

4. Operation and Maintenance

• Designed for minimal pressure loss and reliable sealing.
• Spring-loaded mechanism ensures valve closes under backflow conditions.
• Regular inspection recommended to check for wear or damage.
• Replacement parts available for seals, springs, and other components.

5. Materials and Components

• Detailed list of components with material specifications and quantities.
• Seals available in EPDM and FKM with corresponding codes and dimensions.
• Springs made of stainless steel for corrosion resistance.
• Valve bodies made from corrosion-resistant plastics or metals depending on model.

6. Standards and Certifications

• Conforms to official listings and certifications for potable water use.
• Meets industry standards for pressure and temperature ratings.
• Documentation includes compliance with ISO and ANSI standards.

7. Pressure and Flow Data

• Tables provide flow coefficients (Kv), pressure loss, and weight for each valve size and seal type.
• Flow rates are calculated for fully open valve conditions.
• Graphs and charts (not included here) illustrate performance curves.

8. Additional Information

• Contact information for technical support and ordering.
• Guidelines for warranty and liability disclaimers.
• Instructions for proper handling, storage, and transportation.

Critical Information Summary

• Valve orientation and flow direction must be strictly followed.
• Use only specified materials and components for replacements.
• Installation must comply with local regulations and standards.
• Regular maintenance ensures longevity and performance.

This catalog serves as a comprehensive reference for engineers, installers, and maintenance personnel involved with 39&-8 spring check valves.