Tuthill SDV Series User manual

Tuthill
Dry Vacuum Pump
SDV Series
Models
SDV-120 SDV-320 SDV-800
SDV-200 SDV-430 SDV-1500 SDV-2700
OPERATOR’S MANUAL
Manual 1861 Rev C p/n 001861 0000
Tuthill Springeld tuthillvacuumblower.com 800.825.6937
WARNING: Do Not Operate Before Reading Manual
Operator’s Manual: Tuthill SDV Series Dry Vacuum Pump
Copyright © 2019 Tuthill Springeld
All rights reserved. Product information and specications subject to change.

Disclaimer Statement:
All information, illustrations and specications in this manual are based on the latest information available at
the time of publishing. The illustrations used in this manual are intended as representative reference views only.
Products are under a continuous improvement policy. Thus, information, illustrations and/or specications to
explain and or exemplify a product, service or maintenance improvement may be changed at any time without
notice.
Rights Reserved Statement:
No part of this publication may be reproduced or used in any form by any means - graphic, electronic or me-
chanical, including photocopying, recording, taping or information storage and retrieval systems - without the
written permission of Tuthill Springeld.
Copyright © 2019 Tuthill Springeld
All rights reserved. Product information and specications subject to change.
The employees of Tuthill Springeld thank you for your purchase!
Tuthill Springeld proudly manufactures Kinney®vacuum
pumps and M-D PneumaticsTM blowers and vacuum boost-
ers in Springeld, Missouri, USA. We bring 100+ years of
engineering experience and solid, hands-on care to help
customers keep their processes running. Your satisfaction
is important to us so please take time to provide your Tuthill
sales representative with performance feedback. We love to
hear from our customers!
Tuthill is a family owned business that was started by James
B. Tuthill in 1892. At that time, Tuthill manufactured com-
mon brick to Chicago construction companies who were
fueling the city’s rapid expansion. Fast forward to today
and Tuthill now serves sustaining, global markets like agri-
culture, chemical, construction, energy, food and beverage,
pharmaceuticals and medical, transportation, and utilities.
While the company has changed in what it manufactures,
one thing remains throughout every Tuthill line of business
– we are a company with HEART. Our slogan is “Pump Your
Heart Into It” and everyday our employees do just that as
they represent the Tuthill brand and dare to make better.
Thank you for making Tuthill Springeld part of your com-
pany’s process! FIND OUT MORE AT
TUTHILL.COM
A company with heart
right from the start.

i
Table of Contents
Manual 1861 Rev C p/n 001861 0000
Table of Contents
Introduction .................................................................................. 1
Principle of Operation........................................................................... 1
Construction.......................................................................................... 2
Timing Gear................................................................................ 2
Bearings ..................................................................................... 2
Oil Level Gauge.......................................................................... 2
Materials of Construction...................................................................... 3
Identification.......................................................................................... 4
Specifications (SDV-120 to SDV-430).................................................... 5
Specifications (SDV-800 to SDV-2700) ................................................. 6
Safety ............................................................................................ 7
Graphic Conventions Used in this Manual............................................ 7
Safety Instruction Tags.......................................................................... 7
Safety Precautions for Dry Vacuum Pumps .......................................... 8
Piping ............................................................................................ 9
Fresh Water Cooling.............................................................................. 9
Air-Water Radiator............................................................................... 11
Connections Diagram ........................................................................ 12
Installation .................................................................................. 13
Location ............................................................................................. 13
Foundation .......................................................................................... 13
Pump Installation................................................................................. 13

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Table of Contents
Manual 1861 Rev C p/n 001861 0000
Piping .................................................................................................. 13
Main Piping Assembly.............................................................. 13
Cooling Water Piping Assembly............................................... 14
Air Vent Cap ........................................................................................ 14
Purges......................................................................................... 15
Sequence of Operations..................................................................... 15
Start/Stop (Cleaning) Purges .............................................................. 15
Seal Purge........................................................................................... 16
Cooling Purge ..................................................................................... 17
Post-Process Dry Operation ............................................................... 17
Steam Flushing ................................................................................... 18
Operation .................................................................................... 19
Prestart Checks .................................................................................. 19
Starting the Pump ............................................................................... 19
Stopping the Pump ............................................................................. 20
Lubrication .......................................................................................... 20
Maintenance and Inspection..................................................... 21
Overheating......................................................................................... 21
Abnormalities ...................................................................................... 21
Interference......................................................................................... 21
Freezing .............................................................................................. 21
Inspection Schedule ........................................................................... 22
Daily Inspection ....................................................................... 22
Monthly Inspection ................................................................... 22
Quarterly Inspection................................................................. 22
Bi-annual Inspection ................................................................ 22
Yearly Inspection ...................................................................... 22
Maintenance and Inspection Schedule .............................................. 23
Screw Clearance ........................................................................ 24

iii
Table of Contents
Manual 1861 Rev C p/n 001861 0000
Troubleshooting......................................................................... 25
Vacuum System Checklist ........................................................ 27
Exploded Views and Parts List................................................. 28
SDV-120-200 Exploded View Drawing................................................ 28
SDV-120-200 Parts List ....................................................................... 29
SDV-120 Exploded View Drawing ....................................................... 30
SDV-120 Parts List .............................................................................. 31
SDV-200 Exploded View Drawing ....................................................... 32
SDV-200 Parts List .............................................................................. 33
SDV-320 Exploded View Drawing (Set 1)............................................ 34
SDV-320 Parts List .............................................................................. 35
SDV-320 Exploded View Drawing (Set 2)............................................ 36
SDV-320 Parts List .............................................................................. 37
SDV-430 Exploded View Drawing (Set 1)............................................ 38
SDV-430 Parts List .............................................................................. 39
SDV-430 Exploded View Drawing (Set 2)............................................ 40
SDV-430 Parts List .............................................................................. 41
SDV-800 Exploded View Drawing (Set 1)............................................ 42
SDV-800 Parts List .............................................................................. 43
SDV-800 Exploded View Drawing (Set 2)............................................ 44
SDV-800 Parts List .............................................................................. 45
SDV-1500 Exploded View Drawing ..................................................... 46
SDV-1500 Parts List ............................................................................ 47
SDV-2700 Exploded View Drawing ..................................................... 48
SDV-2700 Parts List ............................................................................ 49
Warranty – Vacuum Products ................................................... 50
Operating Data Form / Product Registration........................... 51

iv
Table of Contents
Manual 1861 Rev C p/n 001861 0000

1
Manual 1861 Rev C p/n 001861 0000
CONGRATULATIONS on the purchase of a new
SDV Dry Vacuum Pump from Tuthill Vacuum &
Blower Systems. Please examine the pump for
shipping damage, and if any damage is found,
report it immediately to the carrier. If the pump is to
be installed at a later date, make sure it is stored
in a clean, dry location and rotated regularly. Make
sure covers are kept on all openings. If the pump is
stored outdoors, be sure to protect it from weather
and corrosion.
Tuthill SDV vacuum pumps are built to exacting
standards and, if properly installed and maintained,
will provide many years of reliable service. Read
and follow every step of these instructions when
installing and maintaining the pump.
WARNING
!
Serious injury can result from operating or
repairing this machine without rst reading
the service manual and taking adequate
safety precautions.
OTE:NRecord the pump model and serial
numbers in the OPERATING DATA form
on the inside of the back cover of this
manual. Use this identication on any
replacement part orders, or if service or
application assistance is required.
This manual provides instructions and precautions
for handling and maintenance of the Tuthill SDV
Dry Vacuum Pump. For best pump life longevity,
read this manual carefully before installing,
operating, or servicing the pump.
PRINCIPLE OF OPERATION
The SDV Dry Screw Vacuum Pump is a single-
stage, dry running, non-contact, variable-pitch
screw type vacuum pump.
The design principle of the SDV is simple. Two
parallel variable-pitch screws, having a highly
sophisticated surface prole consisting of an
Archimedean and Quimby curve and an arc, rotate
in opposite directions. Drive shaft rotation is CW
when viewed from the motor end (drive end) of
the pump. Helical-cut timing gears position these
screws relative to each other.
The pumped gas is compressed into the
discharged port by the rotation of the screws.
A specic amount of clearance for each pump
size is maintained between the two screws and
between the screws and housing, which avoids
metal-to-metal contact. The power of the motor is
transmitted to the main shaft through a coupling or
belt pulley.
Because the SDV has a variable-pitch screw
design, the compression process is more efcient
and the pump runs cooler.
For simplicity and space saving, models SDV-120
through SDV-800 are provided as standard with
anged adapters for mounting a C-ange motor
directly to the vacuum pump, eliminating the need
for a separate base frame–mounted assembly and
coupling guard for the vacuum pumps.
The power of the motor is transmitted to the drive
screw shaft through a V-pulley or a coupling,
and further transmitted to the driven screw shaft
through the timing gears.
INTRODUCTION
01

2
01
Introduction
Manual 1861 Rev C p/n 001861 0000
CONSTRUCTION
Timing Gear
The timing gear is an important part of the screw
vacuum pump. The tooth surface is heat-cured
and polished with a special high-precision tooth-
polishing machine for reduced noise during pump
operation.
Bearings
The bearings on the xed side of the SDV pump
(discharge end) are angular-contact ball bearings.
The bearings on the expansion side (inlet end) are
roller bearings with heavy load capacity. These
bearings have been designed to withstand high-
speed, heavy-load service and to preserve the
clearances between gears and between screws.
Oil Level Gauge
An oil level gauge (sight glass type) is located on
the front end cover. Fill the oil to the top of the
red mark, or OL Mark. Oil levels are indicated as
follows for pumps manufactured after October
2005:
OL: Original Line (Fill oil up to this line
initially)
RH: Running High (During the Operation) –
In this case, check the pump.
RL: Running Low (During the Operation) –
In this case, check the pump.
WARNING
!
If the oil level is too low, gears, bearings and
mechanical seals will be damaged as a result
of improper lubrication.
If the pump were operated with low oil level,
the gears and bearings would seize by lack
of lubrications. If the oil is overlled, the oil
temperature would get elevated and cause high
gear noise and possibly affect the integrity of other
parts in the DE (Drive End) casing. When the pump
is not in use, be sure to check the oil level and
oil contamination, and then add or change the oil
when needed.
During operation, the oil is splashed over the
bearings and mechanical seals by rotation of the
timing gears.

3
01
Introduction
Manual 1861 Rev C p/n 001861 0000
MATERIALS OF CONSTRUCTION
Housing Ductile iron (A536 Grade 60-40-18)
Internal process areas include PEEK corrosion protective coating.
Screw Cast iron (A48 Class No. 30 with PEEK corrosion protective coating.)
Shaft Cr-Mo alloy steel (AISI-SAE 4140)
Lip seals PTFE and carbon mix (Turcon) in stainless-steel body
Slip sleeve
Ceramic-coated, stainless-steel sleeve with an O-ring for serial numbers up to:
SDV-120 KIT KLRZ SN <406>548<853: 086120-0KIT
SDV-200 KIT KALREZ 263<SN<376: 086200-0KIT
SDV-320 KIT, KALREZ 404<SN>507: 086320-0KIT
SDV-430 KIT, KALREZ 351<SN<512: 086430-0KIT
SDV-800 KIT, KALREZ 241<SN>341: 086800-0KIT
SDV-1500 KIT, KALREZ O-RINGS: 086150-0KIT
SDV-2700 KIT, KALREZ O-RINGS: 086270-0KIT
SDV-320 KIT VITON 404<SN<507: 08632V-0KIT
SDV-430 KIT, VITON 351<SN>512: 08643V-0KIT
Polished stainless-steel sleeves (heat tted) for serial numbers from:
SDV120 KIT KALREZ SN 406-548: 086120-1KIT
SDV200 KIT KALREZ SN 263-376: 086200-1KIT
SDV320 KIT KALREZ SN 404-507: 086320-1KIT
SDV430 KIT KALREZ SN 352-512: 086430-1KIT
SDV800 KIT KALREZ SN 241-341: 086800-1KIT
SDV120 KIT VITON SN 406-548: 08612V-1KIT
SDV200 KIT VITON 263<SN<376: 08620V-1KIT
SDV320 KIT VITON SN 404-507: 08632V-1KIT
SDV430 KIT VITON SN 352-512: 08643V-1KIT
SDV800 KIT VITON SN 241-341: 08680V-1KIT
Mechanical seals Rotor – Stainless-steel body with Carbon #5 face
Stator – Stainless-steel with tungsten carbide coating
Table 1-1

4
01
Introduction
Manual 1861 Rev C p/n 001861 0000
IDENTIFICATION
Each unit has a serial number tag and a stamped
housing serial number which are both required
for correct parts identication. The housing serial
number is located on the left side of the pump
body (opposite side of the Tuthill serial number
plate) and the number is normally stamped into
the housing casting and will be a 3 or four digit
number. See examples below.

5
01
Introduction
Manual 1861 Rev C p/n 001861 0000
SPECIFICATIONS
MODEL SDV-120 SDV-200 SDV-320 SDV-430
50 Hz 60 Hz 50 Hz 60 Hz 50 Hz 60 Hz 50 Hz 60 Hz
Nominal displacement
capacity
59 CFM
(100
m³/hr)
71 CFM
(120
m³/hr)
88 CFM
(150
m³/hr)
106 CFM
(180
m³/hr)
157 CFM
(267
m³/hr)
188 CFM
(320
m³/hr)
211 CFM
(358
m³/hr)
253 CFM
(430
m³/hr)
Ultimate pressure 0.04 Torr 0.02 Torr 0.04 Torr 0.02 Torr 0.03 Torr 0.01 Torr 0.03 Torr 0.01 Torr
Motor 5 HP (3 kW) 5 HP (3.7 kW) 10 HP (7.5 kW) 15 HP (11 kW)
Power connection type C-ange C-ange C-ange C-ange
Minimum Speed 1,800 RPM 1,800 RPM 1,800 RPM 1,800 RPM 1,800 RPM 1,800 RPM 1,800 RPM 1,800 RPM
Speed 2,900 RPM 3,500 RPM 2,900 RPM 3,500 RPM 2,900 RPM 3,500 RPM 2,900 RPM 3,500 RPM
Port size 150 # FF Inlet
Outlet
1.5 in. (3.8 cm)
1.5 in. (3.8 cm)
1.5 in. (3.8 cm)
1.5 in. (3.8 cm)
2 in. (5.1 cm)
1.5 in. (3.8 cm)
2.5 in. (6.4 cm)
2 in. (5.1 cm)
Gear oil(1) 0.13 gal (0.5 L) 0.26 gal (1 L) 0.48 gal (1.8 L) 0.48 gal (1.8 L)
Grease 1 oz (30 g) 1 oz (30 g) 3.5 oz (100 g) 3.5 oz (100 g)
Cooling water @ 68°F (20°C)(2) 0.5 GPM (2 LPM) 1 GPM (4 LPM) 2.1 GPM (8 LPM) 2.9 GPM (11 LPM)
Cooling purge(3) None None None None
Maximum water jacket
pressure rating 100 PSIG 100 PSIG 100 PSIG 100 PSIG
Liquid Handling Capacity 1 Gallons per min 1.5 Gallons per min 2 Gallons per min 2.25 Gallons per min
Maximum particle size 25 micron or below 25 micron or below 45 micron or below 45 micron or below
Ambient temperature range * 0°F - 104°F 0°F - 104°F 0°F - 104°F 0°F - 104°F
Maximum discharge pressure
rating PISG / BarG 5 / 0.3 5 / 0.3 5 / 0.3 5 / 0.3
Discharge temperature <230°F (110°C) <248°F (120°C) <311°F (155°C) <347°F (175°C)
Maximum design
temperature, inlet gas 122°F (50°C) 122°F (50°C) 122°F (50°C) 122°F (50°C)
Maximum design temperature,
discharge gas 392°F (200°C) 392°F (200°C) 482°F (250°C) 482°F (250°C)
Maximum design
temperature, oil 158°F (70°C) 158°F (70°C) 158°F (70°C) 158°F (70°C)
Maximum design
temperature, grease 176°F (80°C) 176°F (80°C) 176°F (80°C) 176°F (80°C)
Maximum design
temperature, cooling water 95°F (35°C) 95°F (35°C) 95°F (35°C) 95°F (35°C)
Noise(4) 72 dBA 72 dBA 80 dBA 80 dBA
Weight 396 lb (180 kg) 484 lb (220 kg) 616 lb (280 kg) 770 lb (350 kg)
Dimensions, L x W x H(5) 24.5 × 11.8 × 10.3 in.
(621 × 300 × 262 mm)
29.9 × 14.0 × 11.6 in.
(760 × 355 × 294 mm)
33.8 × 15.0 × 12.8 in.
(858 × 380 × 326 mm)
39.1 × 17.5 × 13.9 in.
(993 × 445 × 352 mm)

6
01
Introduction
Manual 1861 Rev C p/n 001861 0000
SPECIFICATIONS
MODEL SDV-800 SDV-1500 SDV-2700
50 Hz 60 Hz 50 Hz 60 Hz 50 Hz 60 Hz
Nominal displacement
capacity
368 CFM
(625 m³/hr)
441 CFM
(750 m³/hr)
765 CFM
(1,300 m³/hr)
882 CFM
(1,500 m³/hr)
1,324 CFM
(2,250 m³/hr)
1,588 CFM
(2,700 m³/hr)
Ultimate pressure 0.03 Torr 0.01 Torr 0.1 Torr 0.05 Torr 0.1 Torr 0.05 Torr
Motor 20 HP (15 kW) 50 HP (37 kW) 75 HP (55 kW)
Power connection type C-ange Bare shaft Bare shaft
Minimum Speed 1,800 RPM 1,800 RPM 1,800 RPM 1,800 RPM 1,800 RPM 1,800 RPM
Speed 2,900 RPM 3,500 RPM 1,450 RPM 1,750 RPM 1,450 RPM 1,750 RPM
Port size 150 # FF Inlet
Outlet
4 in. (10.2 cm)
2.5 in. (6.4 cm)
5 in. (12.7 cm)
3 in. (7.6 cm)
6 in. (15.2 cm)
4 in. (10.2 cm)
Gear oil(1) 0.58 gal (2.2 L) 1.85 gal (7 L) 2.38 gal (9 L)
Grease 3.9 oz (110 g) 6 oz (170 g) 8.8 oz (250 g)
Cooling water @ 68°F (20°C)(2) 5.3 GPM (20 LPM) 9.5 GPM (36 LPM) 12.7 GPM (48 LPM)
Cooling purge(3) None 94.1 SCFM (160 Sm³/hr) 100 SCFM (170 Sm³/hr)
Maximum water jacket
pressure rating 100 PSIG 100 PSIG 100 PSIG
Liquid Handling Capacity 2.5 Gallons per min 2.5 Gallons per min 2.5 Gallons per min
Maximum particle size 45 micron or below 45 micron or below 45 micron or below
Ambient temperature range * 0°F - 104°F 0°F - 104°F 0°F - 104°F
Maximum discharge pressure
rating PSIG / BarG 5 / 0.3 3 / 0.2 3 / 0.2
Discharge temperature <455°F (235°C) <482°F (250°C) <500°F (260°C)
Maximum design
temperature, inlet gas 122°F (50°C) 122°F (50°C) 122°F (50°C)
Maximum design temperature,
discharge gas 572°F (300°C) 572°F (300°C) 572°F (300°C)
Maximum design
temperature, oil 158°F (70°C) 158°F (70°C) 158°F (70°C)
Maximum design
temperature, grease 176°F (80°C) 176°F (80°C) 176°F (80°C)
Maximum design
temperature, cooling water 95°F (35°C) 95°F (35°C) 95°F (35°C)
Noise(4) 85 dBA 85 dBA 90 dBA
Weight 1,212 lb (550 kg) 2,970 lb (1,350 kg) 3,640 lb (1,650 kg)
Dimensions, L x W x H(5) 44.5 × 18.9 × 15.3 in.
(1,131 × 479 × 389 mm)
59.6 × 25.0 × 20.8 in.
(1,513 × 635 × 529 mm)
66.3 × 26.9 × 23 in.
(1,684 × 683 × 585 mm)
(1) The above listed amount of oil is for reference only. Fill oil to the top
level of the red mark or OL Mark. Special inert oils are available for
hazardous applications.
(2) The above listed amount of cooling water is based on water
temperature of 68°F (20°C). The amount of water varies when using
an After Cooler. Temperature differential between cooling water
supply temperature and discharge temperature shall be
maintained below 12.6°F (7°C).
(3) The cooling purge ow rates are at standard conditions.
(4) Noise levels are based on the pump equipped with an exhaust
silencer and are from 3 ft (1 m) away from the pump.
(5) Dimensions are for bareshaft pump (without motor) only.
* If water is cooling medium then minimum temperature should be 32°F.
Table 1-2

7
Manual 1861 Rev C p/n 001861 0000
GRAPHIC CONVENTIONS USED IN
THIS MANUAL
The following hazard levels are referenced within
this manual:
DANGER
!
Indicates a hazardous situation that, if not
avoided, will result in death or serious injury.
WARNING
!
Indicates a hazardous situation that, if not
avoided, could result in death or serious
injury.
CAUTION
!
Indicates a hazardous situation that, if not
avoided, could result in minor or moderate
injury.
Indicates a situation that can cause damage
to the engine, personal property, and/or
the environment or cause the equipment to
operate improperly.
OTE:NIndicates a procedure, practice, or
condition that should be followed in
order for the equipment to function in the
manner intended.
SAFETY INSTRUCTION TAGS
WARNING
!
Do not operate without belt
guard.
CAUTION
!
Do not valve or restrict pump discharge
opening.
Use oil mist eliminator when operating pump,
ensure adequate ventilation when discharging
indoors.
Refer to manual safety instructions.
The above safety instruction tags were
permanently afxed to your pump prior to
shipment. Do not remove, paint over or
obscure in any manner.
Failure to heed these warnings could result in
serious bodily injury to the personnel operating
and maintaining this equipment.
SAFETY
02

8
02
Safety
Manual 1861 Rev C p/n 0018610000
SAFETY PRECAUTIONS FOR DRY
VACUUM PUMPS
Please read the following safety information before
operating the vacuum pump.
• Do not operate the pump without the motor
drive coupling guard/cover properly attached.
Disconnect the pump motor from the electrical
supply at the main disconnect before removing
the guard/cover. Replace the guard/cover before
reconnecting the power supply to the pump
motor. Operating the pump without the guard/
cover properly installed exposes personnel in
the vicinity of the pump to risk from rotating drive
components.
• Do not operate the pump with oxygen-enriched
gas (greater than 21% by volume) in the suction
line, unless the pump has been prepared with
an inert uid suitable for the application and
equipped with seal and start/stop purge system.
WARNING
!
Pumping oxygen-enriched gases with mineral
oil or other non-inert uids and without
proper purges can cause re or explosion
in the pump, resulting in damage or serious
bodily injury.
• Take precautions to avoid prolonged or
excessive exposure to oil mist or process
materials emanating from the discharge of the
pump.
• Do not allow the pump to discharge into a
closed or inadequately ventilated room. Where
process vapor contains environmentally
unfriendly chemical vapor, pump discharge must
be connected to the properly sized scrubber
system to neutralize the harmful chemicals
prior to the discharge to the atmosphere. Laws
and ordinances may pertain to your local area
regarding discharge of oil mist, oil vapor, or
chemical vapor to atmosphere. Check local laws
and ordinances prior to operation of the pump
with discharge to outside atmosphere.
• Do not restrict the pump discharge in any way or
place valves in the discharge line. The vacuum
pump is a compressor and will generate high
pressures without stalling the motor when
operated at low suction pressures. Excessive
pressure could cause damage or serious bodily
injury.
• Disconnect the pump motor from the electrical
supply at the main disconnect before
disassembling or servicing the pump. Make sure
that the pump is completely reassembled, the
belt guard is properly installed, and all ll and
drain valves are installed and closed before
reconnecting the power supply. Accidental
starting or operation of the pump while
maintenance is in progress could cause damage
or serious bodily injury.
• Lift pump only by the lifting lugs supplied with
the pump. Never lift equipment attached to the
pump by the pump lifting lugs.
• Do not touch hot surfaces on the pump. In
normal operation at low pressures, surface
temperatures will not normally exceed 180°F
(82°C). Prolonged operation at 200 Torr
(267 mbar) may cause surface temperatures as
high as 220°F (104°C).

9
Manual 1861 Rev C p/n 001861 0000
The vacuum pump casing and the front end plate
have an integrated cooling water jacket. The SDV
series pumps can be congured with two different
types of cooling systems: Fresh Water Cooling and
Circulating Cooling.
FRESH WATER COOLING
The fresh water cooling system consists of a
“once-through” cooling water circuit. To monitor
the adequacy of the cooling water ow and the
cooling water discharge temperature, install a ow
indicator, ow switch on the cooling water supply
line and a temperature gauge (or switch) at the
cooling water discharge line.
On SDV-120 pumps, the silencer is not jacketed.
Hence, the cooling water circuit is not extended to
the process exhaust silencer (see Figure 3-1).
PIPING
03

10
03
Piping
Manual 1861 Rev C p/n 001861 0000
S
FI
MOTOR
SILENCER
PROCESS
INLET
VG
PI
FSL TI
COOLING
WATER
SUPPLY
PROCESS
DISCHARGE
SILENCER
DRAIN
COOLING
WATER
DISCHARGE
COOLING
WATER
DRAIN
Figure 3-1 – Typical Process and Inlet Discharge for SDV-120 Models with Once-Through Cooling
On SDV-200 and larger-sized pumps, the cooling water circuit is extended to the process exhaust silencer
(see Figure 3-2).
MOTOR
FI
PI
SILENCER
TI
VG
S
PROCESS
INLET
COOLING
WATER
SUPPLY
FSL Tl
PROCESS
DISCHARGE
COOLING
WATER
DISCHARGE
COOLING
WATER
DRAIN
SILENCER
DRAIN
COOLING
WATER
DRAIN
Figure 3-2 – Typical Process and Inlet Discharge for All Other SDV Models with Once-Through Cooling

11
03
Piping
Manual 1861 Rev C p/n 001861 0000
AIR-WATER RADIATOR
This system is an air-cooled version with a cooling water total recovery system. A centrifugal pump circulates
the cooling water from the SDV vacuum pump to a radiator-fan unit. To monitor the adequacy of the cooling
water ow and the cooling water discharge temperature, install a ow indicator, ow switch on the cooling
water supply line and a temperature gauge (or switch) at the cooling water discharge line.
For SDV-120, the silencer is not jacketed. Hence, the cooling water circuit is not extended to the process
exhaust silencer (see Figure 3-3).
S
FI
MOTOR
SILENCER
PROCESS
INLET
PI
FSL TI
PROCESS
DISCHARGE
SILENCER
DRAIN
COOLING
WATER
DRAIN
VG
MOTOR
MOTOR
TI
Figure 3-3 – Typical Process and Inlet Discharge for SDV-120 Models with Fan-Cooled, Re-circulated Cooling Water System

12
03
Piping
Manual 1861 Rev C p/n 001861 0000
For SDV-200 and larger-sized pumps, the cooling water circuit is extended to the process exhaust silencer
(see Figure 3-4).
S
FI
SILENCER
PI
FSL
TI
TI
PROCESS
DISCHARGE
SILENCER
DRAIN
COOLING
WATER
DRAIN
COOLING
WATER
DRAIN
MOTOR
MOTOR
MOTOR
PROCESS
INLET
VG
Figure 3-4 – Typical Process and Inlet Discharge for All Other SDV Models with Fan-Cooled, Re-circulated Cooling Water
System
Caption Needed Here.
Caption Needed Here.

13
Manual 1861 Rev C p/n 001861 0000
LOCATION
Mount the pump on a base frame with sufcient
rigidity, placed on a at and level surface. If the
pump will be installed outdoors, check the motor,
exterior paint, peripheral equipment, and other
parts for outdoor service suitability.
Allow enough space surrounding the pump
for access during maintenance and periodic
inspections.
FOUNDATION
Make sure the foundation for the pump assembly
and its base frame is at and leveled with adequate
load bearing capacity.
Install the pump and its base frame, peripheral
equipment, and piping when the fountation
concrete has been cured.
PUMP INSTALLATION
Always operate SDV pumps in a horizontal and
level position on a rigid base frame. Never install
SDV pumps in an upright (vertical) or angled
position.
1. Place the pump assembly with the base frame
on a foundation and make sure it is supported
evenly.
2. Insert metal shims between the base frame
and the foundation, if required for leveling. The
pump assembly with the base frame should be
leveled to within 0.02 in. in any 3.28 ft (0.5 mm
in any 1 m).
3. Place adequately sized anchorbolts in position.
4. Once the pump assembly is set on the
foundation and anchorbolts, adequately
grout the base frame before tightening the
anchorbolt nuts. Tigten the anchorbolt nuts
after the grout is rmly cured.
OTE:NTighten the anchorbolts evenly to ensure
the previously set level is not changed.
PIPING
Main Piping Assembly
1. Clean the interior of the process piping to
remove any rust, dust, foreign matter, and weld
slags.
2. Place a 40-mesh strainer, supplied along with
the SDV pump, at the pump process inlet
ange. After initial start-up and continued
operation of the SDV pump for several hours,
disassemble the process inlet piping from the
pump and check the strainer for cleanliness.
If there are any particulates strained, such as
weld slags, etc., clean the mesh strainer and
replace it at the pump process inlet ange.
OTE:NTuthill recommends regularly checking
the condition of the strainer.
INSTALLATION
04

14
04
Installation
Manual 1861 Rev C p/n 001861 0000
3. Install exible connectors on the suction
side of the pump as well as on the discharge
side of the pump. These exible connectors
prevent direct application of any excessive
load (primary and secondary load) to the pump
assembly from the process piping structures.
Properly support the piping to protect the
pump from absorbing excessive load from the
process piping structures.
4. If a process exhaust silencer is provided, install
it on the pump discharge ange or as closely
as possible to it.
5. Install a check valve as close to the process
inlet ange as possible. The check valve
isolates the pump from the process during the
pump shutdown. The pump will turn in reverse
direction if the check valve is not present
at the process inlet ange by the pressure
differentials.
If it is not possible to install the recommended
check valve, install a process isolation valve,
such as a gate valve, and be sure to shut the
valve before stopping the pump.
OTE:NTuthill recommends installing a process
inlet isolation valve regardless of whether
a process inlet check valve is installed.
6. If the process gas contains high condensable
vapors, install a condensate recovery tank.
The tank should collect the condensates and
dispose of or drain them as required.
Cooling Water Piping Assembly
SDV pumps are equipped with an integrated
cooling liquid jackets. A cooling medium, typically
water, must be supplied to the cooling liquid supply
nozzle located at the FEC (Front End Plate). The
cooling medium will be circulated to the pump
casing and discharged from the discharge nozzle
located on the casing.
If a water-jacketed discharge silencer or after
cooler is supplied with the pump, the silencer or
after cooler should receive the cooling liquid, as
well. A single-loop cooling liquid supply line can by
employed by installing piping between the cooling
liquid discharge nozzle at the pump casing and
the cooling liquid supply connection nozzle on the
silencer or after cooler.
The cooling medium supply piping should include
the following instruments.
Cooling Liquid Supply Line:
• Manual isolation valve
• Strainer
• Pressure gauge with an isolation valve
• Liquid ow meter
• Liquid ow switch (or combined cooling liquid
ow meter/switch)
• On/Off solenoid valve
• Flow regulating valve
• Temperature gauge
Cooling Liquid Discharge Line:
• Temperature gauge
• Temperature switch (Optional)
AIR VENT CAP
The air vent cap (see Figure 4-1) should be
unscrewed until the air hole is just above the top
of the thread opening. Main purpose of air vent is
to release the pressure from the rotation of timing
gears in front end cover.
OTE:NDo Not tighten this air vent cap to a
closed position.
Figure 4-1 – SDV air vent cap.