Braking Distance Calculation

The response time of the corresponding valve should be determined from the respective manufacture, in particular when the valve is employed as a brake or a safety device against falling.

When employing the PLUS version we recommend pneumatic valves free of overflow or for example 5/3 way valves (with un-pressurized neutral position). When valves are used that are not free of overflow, overflow can occur at the piston seals when they are activated.

Events Chart:

Events
A - Signal to stop given to control
B - Signal to stop given to brake
C - Brake fully applied
D - Device Stopped, V2 = 0 [m/s]

Force: [lbf] pound force, [N] Newtons
Note: .2248 [lbf] = 1 [N] or 1 [lbf] = 4.45 N

Displacement: [in.] inches, [m] metres
Note: 39.37 [in.] = 1 [m]

Pressure: [p.s.i.], MPa (mega-Pascals)
Note: 145.04 [p.s.i.] = 1 MPa

Factors that could affect the calculation

• Mounting altitude (vertical application)
• Lubrication
• Temperature
• Air pressure supply
• Misalignment

Calculation Assumptions

No change in initial velocity when brake is being applied or responding!