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Catalogs
Hayward Industries, Inc.
Diaphragm Valves 1/2" to 2"

Diaphragm Valves 1/2" to 2"

Product catalog summary

Introduction: This document provides installation, operation, and maintenance instructions for Hayward diaphragm valves. It emphasizes the importance of following these guidelines to prevent injury and ensure proper functioning.

Guarantee and Responsibility: Hayward guarantees its products against defects in material and workmanship but does not assume responsibility for damages or injuries due to improper installation, misapplication, or chemical incompatibility. Users should verify compatibility and suitability for their specific applications.

Operating Conditions: Users must consult Hayward literature for pressure and temperature limitations. The maximum fluid velocity is eight feet per second to avoid damage from water hammer effects. Products are designed for non-compressible liquids and should not be used with compressible fluids.

Installation Considerations: Systems should be depressurized and drained before installation or maintenance. Temperature effects on piping systems must be considered to prevent mechanical loading on equipment. PVC and CPVC products should be handled with caution below 40°F due to brittleness.

Connection Types:

Socket Connections: Follow ASTM specifications for solvent cementing. Ensure surfaces are clean and free of contaminants. Apply primer and cement as instructed, allowing proper set and cure times based on temperature.
Threaded Connections: Use Teflon tape on threads, wrapping in a clockwise direction. Tighten joints using a strap wrench to avoid excessive stress.
Spigot Ends: Follow fusion joining instructions for polypropylene and PVDF valves.

Actuator Connection: Air actuated diaphragm valves have specific NPT air connections. The bottom connection opens the valve, and the top connection closes it.

Repair and Maintenance: Diaphragm replacement is the primary maintenance task. Ensure the system is depressurized and drained before proceeding. Diaphragms should be inspected for wear and replaced as needed, with proper alignment during installation.

Torque Specifications: Recommended torque values for manual and actuated valves are provided, varying by valve size and diaphragm material.

Catalog excerpts

PVDF valves are furnished with Metric pipe size spigots. These spigot ends are sized to either be used with socket fittings or fusion welded directly into the lines. In all cases follow the recommended fusion joining instructions of the Fusion joining machines manufacturer. > On all 1/2Ҕ (15mm) air actuated diaphragm valves and 3/4 (20mm) air to open / air to close actuated diaphragm valves the air connection is a 1/8Ԕ NPT. All other air actuators have 1/4 NPT air connections. The bottom connection opens the valve. The top connection closes the valve. > Maintenance on the diaphragm valves is...

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Diaphragm Valves 1/2" to 2"

Diaphragm Valves 1/2" to 2"

Catalog excerpts

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