Summary of Valve Types and Specifications

1. Double Pilot Operated Check Valves (VBPDE)

This section lists various models of double pilot operated check valves, identified by codes such as V0010, V0020, etc. These valves come in multiple port sizes ranging from 1/4" to 3/4" with different thread types (mostly G threads). Variants include versions with rubber seals, compensators, and flange connections. The valves are designed for controlling flow with pilot operation on both sides.

2. Single Pilot Operated Check Valves (VBPSE)

Single pilot operated check valves are cataloged with codes like V0220, V0230, etc., available in port sizes from 1/4" to 3/4". These valves also feature different configurations such as rubber seals and flange types. They provide flow control with pilot operation on a single side.

3. Overcenter Valves (VBCD)

Overcenter valves are detailed with codes such as V0390, V0410, etc., available in port sizes 3/8" to 3/4". Some models include pressure ratio options (RP 1:8) and variants with flow control or compensator features. These valves are used for load holding and controlled lowering in hydraulic circuits.

4. Overcenter and Descent Control Valves

This category includes valves designed for overcenter and descent control functions, with codes like V0420, V0430, and variants with compensators and flange connections. Port sizes range from 1/4" to 1". These valves ensure controlled lowering and load holding with additional safety features.

5. Relief Valves

Relief valves are categorized into standard relief valves (VMP series) and dual cross relief valves (VAU series). Port sizes vary from 1/4" to 1" with different thread types. These valves protect hydraulic systems by limiting maximum pressure and include versions with pilot operation and compensators.

6. Sequence Valves

Sequence valves (VS2C and VSQAPP series) are available in port sizes 3/8" to 3/4". They are used to control the sequence of operations in hydraulic circuits, ensuring one function completes before another starts.

7. Pressure Reducing Valves (VRP, VU series)

Pressure reducing valves are listed with codes such as V0704/000 and V0590, available in port sizes from 1/8" to 2". These valves regulate downstream pressure to a set value, protecting components and ensuring system stability.

8. Flow Regulator Valves

Flow regulator valves (VUSF, VRFU, VRFB, VPR3, RPF3 series) are provided in sizes from 1/4" to 1" 1/2. They include 90° angle types, compensated versions, and variants with integrated check valves. These valves control flow rate uni- or bi-directionally for precise hydraulic system performance.

9. Other Valve Types

• Directional Valves: Various codes and types for directional control valves with multiple ports and sizes.
• Ball Valves: High-pressure ball valves with codes V083 to V087, available in sizes 1/4" to 2".
• Flow Dividers and Unloading Valves: Valves designed for flow division and pump unloading functions.
• End Stroke Valves: Valves controlling the end of stroke in hydraulic cylinders.
• Plough Valves: Specialized valves for plough equipment control.

Key Parameters and Features

• Port Sizes: Range from 1/8" to 2" depending on valve type.
• Thread Types: Predominantly G (BSP) threads, with some metric and UNF options.
• Variants: Include rubber seals, compensators, flange connections, pilot ratios, and special configurations for specific hydraulic functions.
• Applications: Load holding, flow control, pressure limiting, sequencing, and directional control in hydraulic systems.

Summary Table Extract

Recommendations and Best Practices

• Select valve type based on hydraulic function required: load holding, flow control, pressure relief, sequencing, etc.
• Ensure correct port size and thread type compatibility with system piping.
• Consider variants with compensators or rubber seals for enhanced performance and leak prevention.
• Use overcenter and descent control valves for safe lowering and load holding in lifting applications.
• Relief valves should be selected to protect system components from overpressure conditions.

This document serves as a comprehensive catalog of hydraulic valves with codes, types, port sizes, and key features to assist in selection and specification for hydraulic system design and maintenance.