Page 118 - ParkerBrassCatalog2010

Parker Hannifn Corporation
Parker Brass Products Division
Otsego, Michigan
C14
C
Slow Start Flow Control Valves
Principle
Designed for mounting on either the FRL or power valve, Parker
Prestostart slow start function fttings permit the gradual increase in
pressure to a section of the pneumatic system. This prevents shocks to
the system that may occur when full system pressure is introduced thus
reducing wear and potential damage to components.
Operation
• Mounted on outlet port of FRL to control downstream installation.
• Initial fow through the bolt is controlled by a restrictor and adjustable
needle valve.
• When 2/3rd system pressure is achieved the spring is compressed
allowing immediate increase to full system pressure.
• When the system is pressurized after an emergency stop all
cylinders will return to the position they were in before the system air
was vented.
Pressurization speed
Adjustment of the needle valve to regulate the air fow controls the time
taken to pressurize the system.
Advantages
• Simplifed cabling
• Compact installation
• Reduces wear and damage
Valve Specifcations
MaximumWorking Pressure: 145 PSI
Operating Temperature: +5° - +150° F
Body Material: Brass nickel plated
Bolt Material:Brass nickel plated
Allen Key adjustment
Gold identification washer
Slow start regulator
Spring
Adjustable needle
Valve
To
cylinder
FRL
Soft start operation/Full fow
FC902 Slow Start with Threaded Connection
Part NPT h h
No. threads max. min. f a j l k
FC902-4 1/4 2.44 2.17 7/8 3/4 .95 1.22 .55
FC902-6 3/8 2.44 2.17 7/8 3/4 .95 1.22 .55
F J
K
H
Min
H
Max
L
A
System
Isolating
Valve
Adjustable
time
P
Supply
pressure
Full Flow
with slow-starter
no control
time