Page 123 - ParkerBrassCatalog2010

Parker Hannifn Corporation
Parker Brass Products Division
Otsego, Michigan
C19
C
Catalog 3501E Metric Flow Control Blocking Valves
Control signal
Diaphragm
Poppet valve
Spring
To power valve
Cylinder
page 6
Prestobloc - Pilot-operated blocking fttings
Principle
Prestobloc pilot-operated blocking fttings are designed for mounting
directly to the cylinder ports. Available with push-in or threaded
terminations, these function fttings permit safe and immediate stopping
of the piston rod by blocking the cylinder supply and exhaust.
Operation
• Pilot operated diaphragm maintains full fow when pilot signal is
present.
• Spring closes the poppet valve locking air in the cylinder when the
pilot signal is removed.
• Prestobloc fttings used in conjunction with Prestofow fow
regulators are mounted on inlet and outlet ports.
• Pilot signal should be independent from the control valve.
YDOB
LAIRETAM
TLOB
LAIRETAM
TLOB
DAERHT
GNILAES
ECIVED SNOITANIMRETTOLIP
NOITANIMRET
GNIKROW
ERUTAREPMET
GNIKROW
ERUSSERP
yollAcniZ
detaoCyxopE
ssarB PPSB8/1
PPSB4/1
PPSB8/3
PPSB2/1
nolyN
rehsaW
-mm6
mm21
nI-hsuP
2/1-4/1
PPSB
elameF
daerhT
mm8-mm4
nI-hsuP
0morF° ot
051+° F
ISP041
Technical features
Applications
Prestobloc ftting
P
Moving Blocked
exhaust
supply
Pilot signal
P
exhaust
supply
Removal
initiates blocking
page 6
P
Moving Blocked
exhaust
supply
Pilot signal
P
exhaust
supply
Removal
initiates blocking
Blocking principle
Safety stop
Prevents descent under load in the event of
power failure
Stroke control
Stops the piston in various positions for
conveying and handling applications.
Safety locks
Safety guards for assembly and punch
presses. Combination with an emergency
switch: restarting the cylinder after resetting
the emergency switch.
1
2