LEYBOLD Trivac D30A User Manual

3. NOTE: Most of the vapors have been expelled from the pump when the pressure nears the "ultimate
total
pressure with gas ballast" (see Table 4-1).
NOTE: If your process has high levels of condensable vapors, it may be necessary to run the vane
pump with the gas
ballast valve open (see Section 2-3-2). When running continuously with the gas
ballast valve open, we recommend installing an SE smoke eliminator or an AF exhaust filter with
a return
line.
Close
(see Section 2-3-1) the gas ballast valve (17) after all vapors have been pumped out of the
system or when there
is only a small accumulation of vapor with a large excess of permanent gases.
4-2
OPERATION
WARNING: Don't pump toxic, pyrophoric, or hazardous gases unless your pump has the anti-suckback solenoid
valve modification (see Pages 8 and 57). When pumping these hazardous gases, we recommend a negative pressure
exhaust system and inert gas purging of the oil casing and gas ballast valve. In addition, a pump specially prepared
for perfluoropolyether vacuum oil
is required for pumping highly reactive or extremely corrosive gas. Contact the
factory
for recommendations.
CAUTION: Pumping corrosive gases with a standard pump can result in premature failure. Contact the factory for
pump modifications for your particular process.
CAUTION: RUNNING THE PUMP AT GREATER THAN 1 TORR INLET PRESSURE RESULTS IN AN OIL
MIST IN
THE EXHAUST STREAM. INSTALL AN EXHAUST FILTER (SEE SECTION 3-3) AND CHECK THE
PUMP
FLUID LEVEL FREQUENTLY (SEE SECTION 4-3-1) WHEN OPERATING THE PUMPABOVE 1 TORR
CAUTION:
DO NOT RUN THE PUMP CONTINUOUSLY AT GREATER THAN 300 TORR INLET PRESSURE FOR
THE D2A, D8A, AND D30A PUMP MODELS OR GREATER THAN 187 TORR FOR THE D4A, D16A, D60A, AND
D90A PUMP MODELS.
The 115/230 V, 50/60 Hz, single-phase motors have an automatically resetting thermal overload.
If this overload shuts off the pump and the ON/OFF switch is left ON, the motor will restart itself
as soon as it cools down.
Table 4-1 lists operating and other technical data for each of the TRIVAC dual-stage vane pump models.
1. NOTE: The pump fluid is usually saturated with condensate when the fluid becomes milky white
or dark and the pump runs hot and
fails to reach its ultimate pressure (see Table 4-1).
REQUIRED
ACTION: If during operation, the pump fluid becomes saturated with condensate,
run the
pump with the intake tube (1) and/or vacuum-line valve closed and the gas ballast valve
(17)open (See Section 2-3-1) until the condensate is vaporized and expelled from the exhaust
port (6).
2. If condensate in the pump fluid is severe, the pump should be flushed out and the pump fluid changed
(see Section 4-3-2).
See Symptom 1 of the Troubleshooting Chart (Table 6-1) for other methods
of removing condensate from
the pump fluid.
4-3 PREVENTATIVE MAINTENANCE
NOTE: See
Section 6 (Troubleshooting) to resolve corrective maintenance problems.
4-3-1
Checking the Pump Fluid Level
NOTE: When the pump is not running, the pump fluid level appears lower.
NOTE: It
is not unusual for the pump fluid to foam because of the churning action of the disk (oil slinger).
Foaming is more pronounced at high operating pressures. If only foam is visible in the oil level glass (15), it
means
that the pump fluid level is low.
Occasionally check the pump fluid level when the pump is running near its ultimate pressure (see Table 4-1) and
the gas
ballast valve (17) is closed.
The minimum pump fluid level is reached when the fluid surface is visible at the lower rim of the oil level glass
(15)
or at the "L" mark on the oil sight gauge (72) (See Figure 1-1). If the pump fluid level is low, use Section 4-
3-2,
Steps 7, 8, and 9 to add the appropriate amount of the correct fluid.
The maximum pump
fluid level is reached when the fluid surface is at the top rim of the oil level glass (15) or at
the" H" mark on the oil sight gauge (72). If the pump fluid level is too high, use Section 4-3-2, Steps 1,3, and 5 to
drain some
fluid. Recheck the oil level while the pump is running to ensure that the fluid level is correct.
TRIVAC "A" Manual, Edition L
11

LEYBOLD Trivac D30A Specifications

General

Brand	LEYBOLD
Model	Trivac D30A
Category	Water Pump
Language	English