Accessory Valves
Unclamp Delay Valve
Time delays pressure release in a critical circuit while unclamping n Adjust the delay to control unclamp timing in single-acting devices. May be used with single or double-acting clamping systems. n Eliminate workpiece movement, caused by residual pressure when unclamping over a work support. n Normally open valve (with crossover plate) allows free fluid flow through the valve during clamping, delays release timing during unclamping. n Conveniently mounts between the Vektek Sequence Valve and the fixture manifold (for sequenced operation downstream) or can be ported with fittings and tubing. n Stainless steel internal components for superior corrosion resistance. Operation : The VektorFlo ® Unclamp Delay Valve operates as a normally open element in a hydraulic clamping system. Low pressure fluid flows freely through the valve to downstream devices. As pressure in the system builds, the mechanical pilot piston moves away from the check valve allowing it to close. Full system pressure is reached and flow in the system stops. If pressure leaks off in downstream devices, the check valve will re-open and replenish pressure. During unclamping, inlet pressure falls with main system pressure but downstream pressure is held constant by the check valve.
PARTIAL SCHEMATIC OF SYSTEM SHOWING A WORK SUPPORT WITH TIME DELAYED RELEASE
Sequence #3 - Clamps Over Work Support(s)
Workpiece
Sequence #2 Work Support(s)
INLET
OUTLET
Time Delayed Unclamp (Must Be Single Acting)
Sequence Valve manifold mounted to Unclamp Delay Valve
Sequence #1 - Primary Swing Clamp(s)
ILS704304 REV A
Unclamp Delay Valve Model No.* Pressure Range**
Filtration Included 25 Micron All Ports
Max Flow
Time Delay Preset***
500 to 5,000 psi
3 to 7 seconds Using ISO 32 Fluid
70-4310-00
3.0 gpm
Crossover plate, 93-1977-00, needed when using as a standalone manifold mount valve.
* Manifold mount O-Rings included. Ships with all ports plugged. ** Maximum inlet pressure 5,000 psi. Excess pressure voids warranty *** Duration of time delay may vary depending on the viscosity of oil in the application. If longer delays are required (up to 20 sec.), contact Vektek Customer Support for assistance.
INLET MANIFOLD MOUNT PORT*
PORT* MOUNT MANIFOLD OUTLET SAE 2
.28 THRU 2X
SAE 4 INLET PORT*
3.47
.71
1.40
.31
4.10
1.50
1.47
REMOVE PLUG FOR MOUNTING W/ CROSSOVER PLATE OR SEQUENCE VALVE
.92
.99
.53 1.19
.55
1.25
2.47
1.86
1.63
SAE 4 OUTLET PORT*
MANIFOLD MOUNT FEED HOLES .09/ .19
ILS704300 REV D
4 Mounting Options For proper sealing, mating surface must be flat to 0.003 in. with a maximum 63 µ in. R a surface finish.
M-7
Manifold Mounting Dimensions
B
2X 1/4-20 MOUNTING HOLES THREAD .38 MINIMUM THREAD DEPTH
1 USE AS STANDALONE VALVE EXTERNALLY PLUMBED 4 MOUNTING OPTIONS 2
3
4
EXTERNALLY PLUMBED PAIRED TO SEQUENCE VALVE
USE AS STANDALONE VALVE MOUNTED TO FIXTURE USING CROSSOVER PLATE
USE IN NEW OR EXISTING APPLICATIONS UNDER SEQUENCE VALVE MOUNTED TO FIXTURE
A
2X Ø .09/.19 MANIFOLD FEED HOLES
B
A
1.465 1.805
OUTLET
INLET
.305 .000 .705
2.10
2.88
MANIFOLD MOUNT TO FIXTURE UNDER SEQUENCE VALVE
STANDALONE APPLICATIONS MANIFOLD MOUNTING IN CROSSOVER PLATE FOR 93-1977-00
INLET
OUTLET
OF SEQUENCE VALVE MOUNTING FOOTPRINT UDV FITS WITHIN
SEQUENCE VALVE FEED MANIFOLD MOUNT PORT
SEQ VALVE OUTLET MM TO UDV INLET
ILS704305 REV A
ILS704301 REV B
© Vektek, January 2023
800-992-0236
www.vektek.com
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