Overview

This document provides detailed technical specifications, model information, mounting dimensions, and performance data for differential poppet style relief valves (RV and DRV series), special relief valve models, and selector valves (RD-900 and RD-1800 models) used in hydraulic systems.

1. Differential Poppet Style Relief Valves (RV and DRV Series)

Specifications

• Valve Type: Differential poppet style relief valves.
• Relief Settings: Adjustable and non-adjustable options available.
• Pressure Ranges: Adjustable H type (1500-3000 PSI), Adjustable L type (500-1500 PSI), Non-adjustable NH (1500-3000 PSI), Non-adjustable NL (500-1500 PSI).
• Port Sizes: Multiple port sizes including #12 SAE, 3/4 NPTF, #10 SAE, 1/2 NPTF, #8 SAE, and cartridge only (no body).

Standard Models

Mounting and Machining Dimensions

Detailed mounting dimensions are provided for RV and DRV series valves, including port locations, diameters, and cavity sizes. Relief cartridges for different passages (A/B and C/D) are specified with precise machining dimensions.

Performance Curves

Relief valve flow versus pressure curves are included, showing performance at various set points with 110 SUS oil at 115°F. These curves assist in selecting appropriate valve settings for system requirements.

2. Special Models and Field Conversion Kits

Special RV and DRV models are available with unique mounting dimensions and configurations. Field conversion kits allow modification of existing valves to different specifications or port sizes. Detailed part numbers and descriptions for these kits are provided.

3. Selector Valves (Model RD-900 and RD-1800)

Specifications

• Model RD-900: Selector valve with specified port sizes and flow capacities.
• Model RD-1800: Pressure relief valve with maximum flow ratings and pressure settings.
• Port Sizes: Various port sizes including 3/4 NPTF and others as per model.
• Pressure Settings: Relief pressure settings are adjustable and specified per model.

Performance Data

Pressure relief curves for RD-1800 valves are provided, showing flow rates versus pressure at 110 SUS oil and 115°F. These curves help in understanding valve behavior under different operating conditions.

Mounting Dimensions

Detailed dimensional drawings for RD-900 and RD-1800 models are included, specifying inlet/outlet port sizes, mounting hole sizes, and overall valve dimensions for installation purposes.

4. General Notes and Recommendations

• Relief pressure settings should be specified in PSI; standard settings are provided but can be customized.
• Valve selection should consider port size compatibility, pressure range, and flow requirements.
• Refer to pages 23 and 24 of the standard product price list for pricing and ordering information.
• Use appropriate machining dimensions for cavity preparation to ensure proper valve fit and function.

Summary

This technical document serves as a comprehensive guide for selecting, installing, and understanding the performance of CATV series relief and selector valves. It includes critical specifications, model options, mounting details, and performance characteristics essential for hydraulic system design and maintenance.