Company Information

Hydrop A Hydraulische Erzeugnisse GmbH & Cie., located at KGDärmannsbusch 4, D-58456 Witten, Germany. Contact details include phone: +49 2302 7012-0, fax: +49 2302 7012-47, email: [email protected], and website: www.hydropa.de.

Product Overview

The document describes the ZA 6 RE series of pilot operated check valves (hydraulically releasable check valves) with nominal size 6 (NG 6 / NS 6). These valves are used in hydraulic systems to control flow and pressure.

Dimensions and Application Examples

The document includes dimensional data and examples of application for different variants of the ZA 6 RE valves: ZA 6 RE-A-*, ZA 6 RE-B-*, and ZA 6 RE-AB-*.

Sectional Drawing and Seal Kit

A sectional drawing of the valve with the seal kit is provided. The seal kit includes:

• O-Ring (17.96 x 2.62 mm), material: NBR 90 Shore
• Back-up ring (Stützring) -115
• O-Ring (8.74 x 1.78 mm), material: NBR 90 Shore

These seals are used in the ZA 6 RE-A, -B, and -AB variants.

Performance Curves and Operating Parameters

Performance data is based on oil with viscosity 24 cSt at 50°C. Key parameters include:

• Maximum working pressure: 320 bar
• Maximum flow rate: 40 liters per minute
• Fluid temperature range: 0°C to 75°C
• Ambient temperature range: -25°C to +60°C
• Weight: approximately 1 kg

The performance curves illustrate valve behavior, including free flow through the check valve and valve effectiveness in line B.

Valve Features and Options

• Sealings: Standard (00) or Viton® fluoroelastomers (01)
• Minimum opening pressure options: 1 bar (1) or 5 bar (5)
• Control lines: A, B, or AB
• Pilot ratio: 0 corresponds to 1:4

Viton® is a registered trademark of DuPont Performance Elastomers.

Summary

The ZA 6 RE series pilot operated check valves are designed for hydraulic applications requiring controlled flow and pressure relief. They offer customizable sealing materials and opening pressures, suitable for operating pressures up to 320 bar and flow rates up to 40 l/min. The valves operate reliably within specified temperature ranges and include detailed seal kits for maintenance.