Type BS safety blocks are designed for mounting, pressure isolation, pressure relief protection, and manual or remote discharge (blowing down) of hydraulic accumulators. The main ports match common accumulator fluid ports for simple mounting. A rapid shut-off function is achieved by a 90° turn of a leak-free ball valve handle during emergencies or routine maintenance. Note: This valve is not intended for throttling flow in and out of the accumulator (doing so can damage the ball seats). An integral relief valve provides overpressure protection for the accumulator shell (valve is set at 360 bar, other pressure settings are available on request).Type BS safety blocks also have a port (M) for monitoring fluid pressure within the accumulator. Safety blocks are supplied with NBR (Buna-N®) O-Rings to take BSPP chamfer seal. Additional metal ring to suit BSPP flat face seal available separately.

Technical Data

• Max operating pressure (Ps): 420 bar
• Pressure test (Pt): 1.43 X Ps
• Nominal passage diameter: 10 mm, 25 mm, 32 mm
• Working temperature: -40°C... +150°C Fluid viscosity range: 10 - 400 cSt
• Recommended viscosity: 36 cSt
• Fluid contamination level, Max: Class 21/19/16 according to ISO 4406/99
• Shut-off valve: Ball type
• Safety valve: Type DBDS cartridge safety relief valve
• Discharge valve: Manual or electric
• Mounting position: Vertical or horizontal

Materials

• Body material: Carbon steel phosphated in compliance with directive 2002/95/ec (RoHS) to resist to corrosion
• Valve material: Carbon steel phosphated or galvanized in compliance with directive 2002/95/ec (RoHS) to resist to corrosion
• Seal material:NBR (Buna-N®)
• Accumulator connection:3/4" BSPP1-1/4" BSPP2" BSPP