Y690VB Series
2
Body Sizes
3/4 (DN20) or
1-inch (DN 25)
End Connection Styles
(1)
See table 3
Maximum Allowable Inlet (Positive) Pressure
(2)
150 psig (10,3 bar)
Vacuum Control Pressure Ranges
(2)
See table 2
Maximum Outlet (Casing) Pressure
(2)
Full Vacuum
Maximum Emergency Outlet Pressure to Avoid
Internal Parts Damage
(2)
150 psig (10,3 bar)
Spring Case Connection
1/4-inch NPT Screwed
1. End connections for other than U.S. standards can usually be provided; consult the Fisher Sales Office or Sales Representative.
2. The pressure/temperature limits in this instruction manual and any applicable standard or code limitation should not be exceeded.
Table 1. Specifications
Orifice Size
1/4-inch (6,4 mm) or 1/2-inch (12,7 mm)
Change in Vacuum Control Pressure
to Wide-Open
(2)
See table 2
Pressure Registration
Type Y690VB:
Internal
Type Y690VBM:
External
Material Temperature Capabilities
(2)
Nitrile (NBR):
–20° to 180°F (–29° to 82°C)
Fluoroelastomer (FKM):
40° to 300°F (4° to 149°C)
Ethylenepropylene (EPDM):
–20° to 300°F (–29° to 149°C)
Fluoroelastomer (FKM):
-20° to 300°F (-29° to 149°C)
Approximate Weight
19 pounds (8,6 kg)
Figure 2. Type Y690VB Operational Schematic
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
VACUUM
PUMP
VACUUM
BEING
LIMITED
POSITIVE PRESSURE OR
ATMOSPHERE OR A LESSER
VACUUM THAN THE ONE
BEING LIMITED
B2672
