YVB4021B
TRAPPED PRESSURE TRAPPED
GENERAL PUMP A member of the Interpump Group
SPECIFICATIONS  Pressure Trapping Unloader
Part Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . YVB4021B
Maximum Temperature........................................................195.0 F1
Max. Volume....................................................................21.0 GPM
Rated Pressure .................................................................4050 PSI
Minimum Adjustable Pressure.............................................400 PSI
Maximum Discharge Pressure..........................................4500 PSI
Pressure Drop to Reset Bypass..............................................32%2
Port Sizes: Inlet...........................................................1/2” NPT-F
Outlet ........................................................1/2” NPT-F
Bypass ......................................................1/2” NPT-F
Overall Dimensions ............................................ 6.5” x 4.0” x 1.77”
Weight . . . . .........................................................................2.5 lbs.
Materials . . . . . . . . .............................Brass Body, Stainless Steel
1 This unloader has been designed to operate at a continuous water temperature of
1400F. It can be operated for short periods at a maximum temperature of 1950F. 2 This is the pressure reduction necessary in comparison to the set up, in order that
the valve brings back pressure in the circuit (% figures of the pressure set up).
8
General Pump
is a member of
the Interpump Group
FEATURES
• Suitable for use with multiple guns at the same time
• Dynamic seals made up of O-rings and teflon runner
• Optimized internal passages that guarantee reduced pressure
loss
• No risk of fittings being ejected in case of overpressure
because o-rings are positioned upstream to the threads
• 1/4” NPT fitting for pressure gauge
INSTRUCTIONS
GENERAL PUMP A member of the Interpump Group
YVB4021B
Pressure Trapping Unloader
SELECTION
This product is to be used with clean water which can contain the addition of normal detergents. For use involving different or
corrosive liquids, contact the General Pump Customer Service Department. Appropriate filtration should be installed when using water
that may contain any sort of debris. Choose the valve appropriate for the system rated pressure, maximum flow rate and maximum
temperature. In any case, the pressure of the machine should not exceed the permissible pressure rate imprinted on the valve.
INSTALLATION
On a system that produces hot water, this accessory must be fitted upstream of the heat generator. On a system that generates hot
water, it is advisable to fit in accessories that limit the accidental increase of fluid temperature.
ALWAYS INSTALL A SAFETY VALVE
It is recommended to use a nozzle with a size that, at gun opened, allows to discharge from the valve bypass at least 5% of the flow
supplied by the pump in order to obtain a constant pressure value, and an easy adjustment and to avoid troublesome pressure spikes
at gun closure.
If the nozzle wears out, the working pressure decreases. To reset the pressure back to work level, it is necessary to replace the worn
nozzle. When a new nozzle is fitted, re-setting of the system to its original working pressure is necessary
This part number does NOT have a UPC code.
Factory Brochure
General Pump YVB4021B, Unloader, 4500 psi 21gpm GTIN: N/A [YVB4021B]
Steambrite's Regulators & Unloaders - General Pump YVB4021B, Unloader, 4500 psi 21gpm GTIN: N/A [YVB4021B] is .
If you can find a lower advertised price on the General Pump YVB4021B, Unloader, 4500 psi 21gpm GTIN: N/A [YVB4021B] - YVB4021B,contact us at 210-662-9000,
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