4.3 - PUMP MODELS AND TABLES FOR MATERIAL OF CONSTRUCTION
On the pump nameplate are printed the pump serial number, the year of manu-
facture and the pump model. Refer to the following example for understanding the
coding of the pump model. Ever y letter or number in the pump model designation
has a specific meaning relating to the pump design.
Example of pump model number:
T R H C 80 - 750 / C - M / GH
STANDARD materials of construction
VDMA
Description
GH
F
RZ
RA
A3
106
Suction casing
107
Discharge casing
Cast iron 1561
137
Intermediate plate
110
Center body
Carbon Steel
210
Shaft
Stainless steel AISI 420
Stainless steel
AISI 316
147
Manifold
Carbon steel
357
Bearings & M.S. Hous.
Cast iron 1561
230
Impeller
Ductile
Bronze
iron
Stainless steel AISI 316
For additional details regarding standard or special materials contact TRAVAINI
PUMPS USA.
5 - UNCRATING, LIFTING AND
MOVING INSTRUCTIONS
Upon receipt, verify that the material received is in exact compliance with that
listed on the packing slip.
When uncrating, follow the instructions listed below:
• check for visible damages on the crate that could have occurred during
transpor t
• carefully remove the packaging material
• check the pump/or accessories such as tanks, piping, valves, etc. to
ensure that it is free of visible markings such as dents and damage which
may have occurred during transpor tation
• in the event of damage, repor t this immediately to the transpor t company
and to TRAVAINI PUMPS USA Customer Ser vice depar tment.
Discard through controlled disposals all packaging materials that may constitute
personal injur y (sharp objects, nails, etc.).
– 4 –
4 - PUMP OUTLINES
The instructions given in this manual are for liquid ring vacuum pumps and com-
pressors and for systems type WATER SEALED or OIL SEALED (DynaSeal
TM
) which
utilize said pumps.
NOTE: Capacities, vacuum and pressures are nominal and are the maximum
attainable values under standard operating conditions. Please contact TRAVAINI
PUMPS USA for data on liquid ring compressors series TR…
TRM
Single stage liquid ring vacuum pumps
Capacity to 210 ACFM, max vacuum 33 mbar (25 Torr)
TRS
Single stage liquid ring vacuum pumps
Capacity to 2100 ACFM, max vacuum 150 mbar
(100 Torr)
TRV
Single stage vacuum pumps
Capacity to 300 ACFM, max vacuum 33 mbar (25 Torr)
TRH
Two stage liquid ring vacuum pumps
Capacity to 2100 ACFM, max vacuum 33 mbar
(25 Torr)
SA
Double acting liquid ring compressors
Capacity to 110 ACFM, pressures to 10 bar–(145 psig)
4.1 - PRINCIPLE OF OPERATION
(See figure at side)
The aspirated gas enters the pump chamber A-B
via the pump suction flange. The gas is trapped
between two (2) impeller vanes. The impeller
rotates eccentrically in relation to the centerline of
the liquid ring that, by centrifugal force, assumes
the shape of the impeller casing. The progressive
change of volume between the two (2) vanes, the
impeller hub and the liquid ring first creates a
vacuum and then a compression of the gas in the
B-C area till the gas is discharged, together with a
por tion of the liquid, through the discharge por t
C-D. The lost liquid must then be replenished.
4.2 - SERVICE LIQUID PROPERTIES
For good operation, the liquid ring pumps must be supplied with a ser vice liquid,
which is clean, non-abrasive and free of any solids. The ser vice liquid tempera-
ture should not exceed 80 °C and the gas handled should be maximum 100 °C;
the liquid density should be between 0.8 and 1.2 g/cm3 and the viscosity should
be less than 40 °C (the pump per formance will change if the ser vice liquid has
proper ties different than those of water at 15°C (60°F). All engineering data is
based on the use of 15°C (60°F) as ser vice liquid, see section 17 for additional
information. Contact TRAVAINI PUMPS USA before using liquids with proper ties
outside the ranges listed above.
– 3 –
T
– Manufacturer POMPETRAVAINI
R
– Liquid ring pump
H
– M and V = Single stage pump
with high vacuum
S = Single stage pump with
medium vacuum
H = Two stage pump with high
vacuum
C
– Revision of hydraulic design
80
– Ø Flange size (mm)
750
– Nominal capacity in m
3
/h
C
– C = Shaft sealing by mechanical
seal
B = Shaft sealing by stuffing box
M
– Monoblock design with motor
flange (upon request)
GH
– Material of construction
GH - F - RZ - RA - A3
(see following table)
