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16" Turbine Pitless Unit

16 inch turbine pitless units Click the image to view full size

The Monitor 16" Turbine Pitless Unit, for line shaft turbine pumps, forms a watertight extension of the water well casing. While the upper casing extension is 12 inches or more above grade, the Turbine Pitless Unit discharge is buried below grade for a sanitary transfer of water to a water tower or water treatment plant. The Turbine Pitless Unit upper casing is flanged to receive a motor. Once the motor assembly is made to the Turbine Pitless Unit, a complete assembly is formed and a watertight seal is formed.
 
Options for turbine pitless units include: epoxy coating, flanged upper casing, and water sampler.
 
The Monitor Turbine Pitless Unit bearings are water lubricated.

 
  • Features
  • Specifications
  • Parts Breakdown
  • Ordering Instructions

CORROSION PROTECTION — All water passages are either hot-dipped lead free galvanized or constructed of corrosion resistant material.

EASY TO SERVICE — The inner parts of the pitless unit and the column pipe may be removed without digging up the discharge pipe. The Pitless unit and the pump or well may then be serviced. This easy removal, by lifting, is made possible due to the o-ring seals in the spool. Replacement is equally simple.

RELIABLE SEALS — Neoprene O-rings between accurately machined hot-dipped lead free galvanized surfaces on the spool and and within the unit provide positive seals.

O-RING SEAL PROTECTION — Monitor seal protection prevents seal damage during installation and service.

FROST PROOF — No heating is required. All water passages are below the frost line.

QUICK TO INSTALL — A quality pump installation can be made easily and economically without delay for masonry or building construction.

PROTECTED SCREEN VENT — standard on all units.

SUPPORT RINGS — Prevent distortion of the discharge body due to vertical movement of discharge pipe.

ACCURATE ALIGNMENT — Precision machining assures accurate alignment.

 

OPTIONS:

EPOXY PAINTING — can be done, if required, for extra protection in certain soil types.

ADDITIONAL TAPPING IN SPOOL — is available upon request.

TRANSITION SLEEVE FOR MECHANICAL JOINT — is available upon request.

 

Units can be supplied with a discharge designed for threaded, welded, flanged or mechanical joint with transition sleeve connection. Column pipe connection is male iron pipe thread.

 
COMPONENT MATERIALS
Well Vent - cast iron, green enamel finish.
Motor Support - cast iron, black corrosion resistant coating.
Combination Hold-Down & Lift-Out Mechanism - steel, black corrosion resistant coating.
Hold-Down Pipe - steel, black corrosion resistant coating.
Pitless Case - steel, corrosion resistant coating.
Discharge Body - steel, lead free galvanized.
Spool - steel, lead free galvanized.
NOTE: Provision for prelubrication not available.
NOTE: Units are designed for motors having an RPM of 1800 or less and a 18-5/8” base diameter having a 14-3/4 ” bolt circle. Maximum bury depth will be 9 feet. For units requiring exceptions to these conditions of design, special specifications must be used.
NOTE: Any combination between Column Pipe and Discharge Outlet size is possible, if required.

 
A Unit minimum I.D. 15-1/4 in.:  chamfered for butt weld to well casing.
B Pitless Unit with Black Upper Case Std.:  17-1/4 in. I.D., 18 in. O.D.
C 2-1/2 in. NPT Tapping for Well Vent.
D 2-1/2 in. Protected Screen Well Vent.
E Lift-Out Pipe:  6 in. IPS.
F Turbine Motor having a maximum base diameter of 18-5/8 in. (Supplied by others)
G Motor Mount Access Openings:  (2) openings measuring 8-3/4 in. wide x  8-1/4 in. high.
H 7-5/32 in.
I 14 in.
J 12 in.
K Shaft Bearing Housing.
L Two 1 in. NPT Tappings ported to Column Pipe.
M Shaft Bearings (Supplied by pump manufacturer):  Total length of bearing to be 10 in. and a maximum O.D. of 2-1/2 in.
N 3/4 in. drain.
O Dimension from center of Discharge Outlet to bottom of Discharge Body:  11-1/16 in.
P 1-1/2 in. NPT Tapping for optional Water Sampler.
Q 1 in. NPT Tapping.
R Rabbet Fit for Upper Grease Seal Bearing Housing:  Minimum O.D. of 3 in. and maximum O.D. of 4 in.;  maximum Bolt Circle of Bearing Housing - 5-1/4 in. (Bearing & Bearing Housing supplied by others)
S 1-1/4 in.
T 2-1/4 in.
U 5 in.
W 27-7/16 in.
X 11-15/16 in.
 
Z SPOOL TO DROP PIPE CONNECTION SIZES:  5 in. NPT 6 in. NPT 8 in. NPT
  The Standard Spool is designed for a 120,000 lb. maximum load.  Spools are available to sustain higher loads. (3/4 Taper) (3/4 Taper) (3/4 Taper)
AA Dimension from center of Discharge Outlet to bottom of Spool: 16-1/4 in. 21-7/8 in. 15-13/16 in.
  DISCHARGE CONNECTIONS & SIZES:
  For [BB] Butt Weld (IPS): 5 in. I.D. 6 in. I.D. 8 in. I.D.
  For [CC] Flanged (ASA Std. 150 lb.): 5 in. I.D. 6 in. I.D. 8 in. I.D.
  For [DD] Threaded nipple (NPT): 5 in. I.D. 6 in. I.D. 8 in. I.D.
  For [EE] Transition Sleeve (IPS): 5 in. I.D. 6 in. I.D. 8 in. I.D.
FF Dimension from center of Well Casing to the end of Discharge Outlet.
  With [BB] Butt Weld Discharge: 23 in. 23 in. 17 in.
  With [CC] Flanged Discharge: 26-1/2 in. 26-1/2 in. 21 in.
  With [DD] Threaded Discharge: 26 in. 27 in. 21 in.
  With [EE] Transition Sleeve Discharge: N.A. 29 in. 23 in.
GG SPOOL ASSEMBLY
  Area of Water Passage(s): 19.6 sq. in. 39.2 sq. in. 39.2 sq. in.
  Percent Area of Water Passage(s) to Area of Drop Pipe: 100% 138% 78%

Specifications are Subject to Change Without Notice.


ANY ORDER FOR REPAIR
PARTS MUST BE
ACCOMPANIED BY
THE PITLESS UNIT
SERIAL NUMBER AND
ORDER NUMBER
Key No. Qty Description Ord. No.
1 1 Screen Well Vent 2 1/2” NPT PS155
2 1 Motor Support Stand* UM400
3 4 Hex Head Cap Screw 1”-8NCX4-1/2” L. ----------
4 2 Screw Pin Anchor Shackle-1 3/8” Bow Size ----------
5 1 Pipe Plug 1 1/2x11 1/2” NPT UG54
6 4 Hex Socket Cap Screw-1/2-13NCx 1 1/2” L. UK468
7 1 Upper Bearing Seal Housing (Machined to customer specifications) UK564
8 6 Hex Head Cap Screw-7/8-9NCx3 1/2” L. UK471
9 1 Pipe Plug, 1”-11 1/2”NPT SW33
10 1 Motor Support Plate* UM400
11 1 Air Test Adapter UK180
12 1 Lift-Out Pipe Assembly UM563
13 10 Hex Nut, 7/8-11NC UK188
14 1 Elbow, 3/4” IPx 3/4”-Plastic UM149
15 1 Pipe Clamp - 3/4” UM147
16 1 Drain Pipe UL88
17 1 Bearing Seal Housing UM83
18 1 Static Seal Ring PS575A
19 1 Spool Assembly (Order by description & Unit Serial No.) ------
20 4 Hex Nut, 3/8-16NC UB17
21 4 Lockwasher TX31
22 2 Static Seal Rings for spool UM15
23 4 Washer SW68
24 4 Washer UL95
25 4 Machine Screw, 3/8-16NCx2 1/4” L UM222
26 4 Hex Nut, 3/4-10NC UM140
27 1 Discharge Body & Upper Case Assembly (Order by description & Unit Serial No.) ------
Note: On 16" units the Motor Support Stand and the Motor Support Plate are one piece construction. (Key Nos 2 and 10)
Turbine Pitless unit
DESCRIPTION - ORDERING NUMBERS
A
3
 Bury Depth in Feet
 
PT
 Pitless Unit for Turbine Pump
B
16
 spacerWell Size - Ins.
C
18
 spacerUpper Case Size - Ins.
D
W
 spacerAttachment to Well Casing-Welded
E
B
 spacerBlack Upper Case
F
E
 spacerPressure Equalizing Spool Passages
 
0
 spacerStandard Spool
G
6
 spacerDrop Pipe I.D. Ins. (5", 6" or 8”)
H
   spacerThreaded NPT Std. spacer
spacerConnection
Discharge
Connections
(Select One)
F
 spacerFlange, ASA 150#
  spacerWelded
  spacerMech. Joint w/transition
spacersleeve
                        Accessory - Transition Sleeve
I
6
 spacerDischarge I.D. Ins. (5", 6”, or 8”)
 
W
 spacerWaterlube
     
  Special Provision (X)

 

  

UNITS AVAILABLE BY QUOTATION ONLY
10” THROUGH 20” WELL SIZES

EXPLANATION OF PITLESS UNIT
ORDERING NUMBERS
The diagram illustrates the meaning of the various letters and numerals used in Monitor Turbine Pitless Unit ordering numbers. A typical order number and the pitless unit it stands for are shown.
Typical Order Number
3PT1618WBWE06F6W

3

A. The first numeral in the order number indicates the bury depth, in feet, of the unit. Bury depth on all units is measured from the center of the discharge line to ground level. The top of the pitless case extends 12” above ground level as is required by many codes.
PT
 The type of pump the pitless unit is designed for. The unit shown is a PT for Line Shaft Turbine Pumps.
16
 B. The well casing size is for 16" wells.
18
 C. The upper pitless case size, 18”
W
 D. The attachment to the well casing is a welded joint.
B
 E.  The upper pitless case is black pipe.
E
 F.  The spool has pressure equalizing passages.
0
      The type of spool has no silent check valves.
6
 G. The size of column pipe in inches.
F
 H. The discharge connection is Flanged.
6
 I.  The size of discharge pipe in inches.
W
 The type of Line Shaft Turbine the unit is designed for, "W" water-lubricated.