SAF Series Safety and Shut-off Blocks

HYDAC safety and shut-off blocks are designed to protect, shut-off, and discharge hydraulic accumulators or user units. The compact design simplifies the hydraulic system connection and offers the following advantages:

• minimum space compared to individual components
• reduced installation time
• various system connections
• system lockout

Features

1. pressure relief valve (DB12)
2. pressure gauge (optional)
3. main shut-off valve
4. manual bleed valve
5. 2-way solenoid operated bleed valve (optional)
6. accumulator

Circuit Diagram

Technical Specifications

Fluids Mineral oil, hydraulic oil, water glycol, non-flammable fluids (other fluids upon request)

Temperature (for carbon steel) 5º to 180ºF (-15º to 80ºC)

Maximum Working Pressure up to 5800 psi (400 bar)

Construction

The Safety and Shut-off Block consists of a valve block, a built-in pressure relief valve, a main shut-off valve, and a manually operated bleed valve. In addition, an optional solenoid operated bleed valve allows automatic pressure relief of the accumulator or user unit and therefore relief of the hydraulic system in an emergency or during shut-down. The necessary return line connection is provided in addition to the gauge connection.

Standard Models

Model with manually operated bleed valve

The basic model type “M” contains a manually operated bleed valve for manual pressure release of the accumulator.

Sizes: SAF 10 M, SAF 20 M, SAF 32 M

Model with solenoid operated bleed valve

In addition to the features of the type “M” block, the type “E” model also contains a solenoid operated bleed valve for automatic pressure release of the accumulator.

Sizes: SAF 10 E, SAF 20 E, SAF 32 E

Connections

• S – Accumulator Connection
• P – System Connection
• T – Tank Connection
• M1 – Gauge Connection

Pressure Relief Valve (DB12)

This valve cannot be set to values in the shaded area