Page 8 - JB Product Catalog 52

Vacuum Pumps
JUST BETTER SINCE 1967 | HVAC TOOLS, VALVES AND FITTINGS
Vacuum Pump Tips
Change Your Pump Oil
Deep vacuum cannot be achieved with contaminated oil, which can damage pump and shorten pump life. JB recommends pump oil be changed after every evacuation for maximum performance and pump efficiency.
Use a Micron Gauge
The best test to check for oil contamination is through a micron gauge. In a leak-free system, if micron gauge is not reading a deep vacuum, the oil is contaminated and should be changed. During testing process is the only time it is recommended to have a micron gauge attached directly to pump.
Choosing Proper CFM
CFM2 = Maximum Tonnage Rating
Take the CFM rating and multiply it by that number to find the maximum number of tons a pump is rated for:
3 CFM pump (3x3) is rated for 9 tons 7 CFM pump (7x7) is rated for 49 tons
Depending on the system line size, it is better to use two or more small, easily maneuverable pumps at different locations to overcome pressure drop issues and evacuate faster than a single, large pump. Pumps in the 1.5 to 10 CFM class are adequate to handle 99% of the work.
JB pumps are built to last and are the best and longest lasting pumps in the industry. To learn how to properly care for your pump, visit jbind.com.
DV-29
Vacuum Gauge Blank-off Test Kit
The DV-29 Vacuum Gauge Blank-off Test Kit works with vacuum gauges and the SH-35N Wireless Digital Gauge for Superheat and Subcooling to create a closed system ideal for checking leaks.
Using a Vacuum Gauge
How to Measure Evacuation
Digital vacuum gauges such as the DV-41 SUPERNOVA, the DV-40S or the DV-22N can precisely read the low pressures produced when evacuation/ dehydration is complete. Evacuation is complete when a system holds at 500 microns. Although a compound gauge can indicate that a vacuum is being produced, it cannot measure pressure accurately or indicate whether moisture or contaminants remain in the system. A digital vacuum gauge can positively
indicate that the system is free of leaks and non-condensables.
MANIFOLD
Placement of the digital vacuum gauge is important. The ideal location to measure vacuum is at the system, not the pump. Attach the digital vacuum gauge directly to the system, isolating the gauge from the pump, hoses and manifold for an accurate measurement of the vacuum in a system.
DV-22N
SOLD SEPARATELY
DV-293
DV-292 DV-294
DV-295
DESCRIPTION
Leak-proof micron hook-up test kit, includes: DV-292, DV-293, DV-294, and DV-295
DV-291 Replacement 1/4" SAE swivel coupler (D10244)
DV-292 Replacement 90° male flare with 1/4" o-ring QC
DV-293 Replacement valve assembly 1/4" MFL connector
DV-294 Replacement 10" (25.4 cm) metal hose with o-ring
DV-295 Replacement ball valve with o-ring QC and depressor
P90009 Replacement o-ring (10 pack)
FOR SUPERHEAT AND SUBCOOLING SH-35N SOLD SEPARATELY
CONDENSER
PART NO.
DV-29
M2-5-410A SOLD SEPARATELY
VACUUM PUMP
8 JB INDUSTRIES • Product Catalog 52 • 800.323.0811 • sales@jbind.com
For faster evacuation time and to achieve optimum pump performance:
1.SelectthecorrectpumpCFM. TOOL GAUGE
MANIFOLD
VACUUM GAUGE
VALVE CORE TOOL
COMPRESSOR
EVAPORATOR
RECEIVER
VALVE
C
E
CO
OR
E TOOL
RE
E
VALVE
CORE
VACUUM EVAPORATOR
2. Use clean oil and be sure to change puCmOpNDoEiNlSwERith BLACK GOLD Vacuum Pump Oil after each use. Clean oil improves pump efficiency and extends pump life. VALVE
CORE COMPRESSOR RECEIVER
3. Remove restrictive valve cores from both high and low side fitting with the A32525N and A32500N valve core tools.
4. 5.
Evacuate both high and low side of the system simultaneously with
a short, 3/8” diameter or larger size evacuation hose, such as the
VL-100 VELOCITY Rapid Evacuation Kit. VACUUM PUMP
TOOL
Attach a DV-22N digital vacuum gauge directly to the system to monitor accurate measurement of vacuum.