Gast VG-260-08-00 - Manual (Page 2)

INSTALLATION and OPERATING INSTRUCTIONS for
PLASTIC MULTI-STAGED VACUUM GENERATORS
SAFETY
 This is the safety alert symbol. When you see this symbol, per-
sonal injury is possible. The following signal words show the degree
of injury. Read the information carefully before proceeding.
 DANGER Severe personal injury or death will
occur if hazard is ignored.
 WARNING Severe personal injury or death can
occur if hazard is ignored.
 CAUTION Minor injury or property damage
can occur if hazard is ignored.
GENERAL INFORMATION
Ambient temperature for normal operation should not exceed
125 o F (52 o C). The low atmospheric pressure at high altitudes re-
duces performance of this unit. Materials used in the construction of
the vacuum generator include Delrin and Neoprene. If the unit will
see substances other than air, consult your local Gast representa-
tive for compatibility.
INSTALLATION
 CAUTION Supply pressure regulated air to inlet of vacuum gen-
erator. Excess pressure can cause parts to burst.
1. The Gast vacuum generator may be mounted in any position
Mounting holes are provided in the aluminum head. Shock
mounting is not required. Round body area must not contact
any rigid frame to maintain alignment.
2. Connect a supply of clean, dry, regulated air to the inlet port in
the aluminum head. Regulator setting should be between
30 and 70 psig (2-5 bar). Best setting is 68 psig (4,6 bar). NO
LUBRICATION should be used with the Gast vacuum
generator.
3. The Gast vacuum generator has multiple inlet ports for con-
nection to the system to be evacuated. Unused ports
should be plugged. Connections to the system must be
equal or larger than the port. Smaller piping will cause lower
vacuum flows. Sealant should be used on all threads to prevent
leakage. Be sure to keep excess sealant from being drawn
into the vacuum generator. Dusty or dirty applications should
have a filter installed to prevent material from being drawn into
the generator. Gast filter AB665 is suggested.
 WARNING Restriction of the exhaust air can cause the vacuum
port to become pressurized. Components not designed for full
line pressure can burst causing injury or death.
4. The exhaust port is located in the round end opposite the inlet
port. The muffler supplied should be attached to this port. DO
NOT RESTRICT the outlet of this muffler. This would reduce
both flow and maximum vacuum.
OPERATION
 WARNING Solid or liquid material exiting the muffler outlet can
cause eye damage or skin cuts. Keep away from air stream.
To operate the vacuum generator, turn on the regulated air supply.
Air flowing through the unit causes vacuum to develop at the intake
ports. Material can enter the vacuum generator either in the com-
pressed air stream or at the vacuum port, it will be ejected through
the exhaust muffler.
Units with multiple stages contain valves which close as vacuum
levels increase. This gives higher flows at low vacuums, reducing
the amount of time required to evauate a system.
Adjust the regulator to 68 psig (4, 5 bar) for best vacuum genera-
tion. Block off vacuum line to check for maximum vacuum. Lower
than specified vacuum may be the result of system leaks. If this
condition appears, check and seal leaks.
SERVICING
 CAUTION Shut off compressed air supply before servicing.
Parts may burst if air is on when unit is disassembled.
Your Gast vacuum generator requires no scheduled maintenance.
If performance drops, it may require cleaning. In most cases it is
not necessary to remove the vacuum generator from the system.
1. Turn off or disconnect air supply.
2. Remove muffler. Remove (2) nuts on the exhaust end of the
tie rods.
3. Slip aluminum tube off of round portion. Hold exhaust end in
place while removing tube.
4. Remove each venturi stage and gaskets. Note the position of
each valve, gasket and venturi.
5. Remove any solid material and wash all parts in MILD DE-
TERGENT and WARM WATER to clean. Use of solvents
may damage parts.
6. If new gaskets and valves are required, use Gast Repair
Kit K549. Note not all parts included are required for each
model. Refer to drawing for proper installation.
7. Reassemble in reverse order. Torque nuts to 3in.-lb. (0,3 Nm).
.
Gast Manufacturing, Inc.
P.O. Box 97
2300 Highway M139
Benton Harbor, MI 49022
Ph: 269/926-6171
FAX: 269/925-8288
www.gastmfg.com
Gast Group Limited, United Kingdom
Unit 11, The I O Centre Nash Road
Redditch, B98 7AS
United Kingdom
ph: +44 (0) 1527 504040
Fax: +44 (0) 1527 525262
www.gastmfg.com
Gast Hong Kong
Unit 12, 21/F, Block B New Trade Plaza
6, On Ping Street, Shatin
N. T. Hong Kong
Ph: (852) 2690 1008
Fax: (852) 2690 1012
www.gasthk.com
We have Gast Certified Service Centers throughout the world. For the most up-to-date listing, contact one of our sales offices below: