2.2.4.1
Outlet Mufflers and Vents
Provide pumps with outlet mufflers.
2.2.4.2
Drives
Electric motor driven with either flexible couplings or V-belt drives.
2.2.4.3
Vacuum Receivers
Welded steel tanks with ASME BPVC SEC VIII D1 code and label for the
indicated vacuum pressures. Protect interior and exterior surfaces of
receivers with factory-applied 0.13 mm 5 mil minimum non-toxic enamel or
galvanized coating. Provide necessary gages, switches, and drains as
recommended by the manufacturer.
2.2.4.4
Failure Alarms
Provide pressure switch to activate alarm when vacuum pressure falls 20
percent below predetermined setting.
2.2.4.5
Automatic Controls
Provide automatic controls for alternating the units on startup and prevent
simultaneous start-up of two or more units when on emergency power.
2.2.4.6
Solenoid Valves
For vacuum pumps of the water seal or water displacement construction,
provide brass, bronze, or steel body. Provide solenoid valve to cut off
water supply when the pump is not running.
2.2.5
Anesthesia Gas Evacuation Pumps
Provide water-seal, positive-displacement, non-pulsating, vacuum pumps for
handling flammable gases. Provide capability of a maximum vacuum level of
85 kPa 25 inch Hg. Ensure pump numbers, sizes, capacities, and operating
pressures (vacuum) are as indicated.
2.2.5.1
Provide minimum 90 percent water recirculation system with heat exchanger
and controls. Provide a solenoid valve in the pump water supply to shut
off the water when the pump is not running.
2.2.5.2
Motor Controls
Provide automatic, adjustable, vacuum-sensing, hand-off-automatic, electric
switch; NEMA ICS 6, Type 12, UL Listed, dustproof control panel; circuit
breakers for each control circuit; hour meter; magnetic starter; and
heavy-duty alternator for the motors.
2.2.6
Oral Evacuation Pumps
Self-governing multi-stage turbine or rotary-vane pumps with direct
connected electric motor drive capable of continuous operation under no
flow conditions. Provide capability of a maximum vacuum level of 95 kPa 28
inch Hg. Provide air cooling and automatically lubricating provisions.
Ensure pump number, sizes, capacities, and operating vacuum pressures are
SECTION 15217N
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