Emerson Daniel PT Series User manual

Installation and maintenance instructions
P/N 3-9000-011, Rev G
February 2016
Daniel™ "PT" Liquid Turbine Meters
3" through 24" sizes

Flow Lifecycle Services for Daniel products
Location Telephone number Fax number
North America/Latin America +1.713.467.6000 +1.713.827.4805
Flow Lifecycle Services for Daniel products +1.713.827.6314 +1.713.827.6312
USA (toll free) +1.888.356.9001 +1.713.827.3380
Asia Pacific (Republic of Singapore) +65.6777.8211 +65.6777.0947.0743
Europe (Stirling Scotland, UK) +44 (0)1786.433400 +44 (0)1786.433401
Middle East Africa (Dubai, UAE) [phone] [phone]
Daniel Measurement and Control, Inc. (Headquarters)
11100 Brittmoore Park Drive
Houston, TX 77041 USA
http://www.EmersonProcess.com
Email
•Customer Service: [email protected]
•Customer Support: [email protected]
•Asia-Pacific: [email protected]
•Europe: [email protected]
Return Material Authorization (RMA)
A Return Material Authorization (RMA) number must be obtained prior to returning any equipment for any reason. Download the
RMA form from the Support Services web page by selecting the link below.
http://www2.emersonprocess.com/EN-US/BRANDS/DANIEL/SUPPORT-SERVICES/Pages/Support-Services.aspx

Signal words and symbols
Pay special attention to the following signal words, safety alert symbols and statements:
Safety alert symbol
This is a safety alert symbol. It is used to alert you to potential physical injury hazards. Obey all safety messages that follow this symbol
to avoid possible injury or death.
DANGER!
Danger indicates a hazardous situation which, if not avoided, will result in death or serious injury.
WARNING!
Warning indicates a hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION!
Caution indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.
NOTICE
Notice is used to address safety messages or practices not related to personal injury.
Important
Important is a statement the user needs to know and consider.
Tip
Tip provides information or suggestions for improved efficiency or best results.
Note
Note is “general by-the-way” content not essential to the main flow of information.

Important safety instructions
Daniel Measurement and Control, Inc. (Daniel) designs, manufactures and tests products to function within specific conditions.
Because these products are sophisticated technical instruments, it is important that the owner and operation personnel must
strictly adhere both to the information printed on the product and to all instructions provided in this manual prior to installation,
operation, and maintenance.
Daniel also urges you to integrate this manual into your training and safety program.
BE SURE ALL PERSONNEL READ AND FOLLOW THE INSTRUCTIONS IN THIS MANUAL AND ALL NOTICES AND PRODUCT WARNINGS.
WARNING!
Failure to follow the installation, operation or maintenance instructions for a Daniel product could lead to serious injury or death
from explosion or exposure to dangerous substances.
To reduce the risk:
•Comply with all information on the product, in this manual, and in any local and national codes that apply to this product.
•Do not allow untrained personnel to work with this product.
•Use Daniel parts and work procedures specified in this manual.
Product owners (Purchasers):
•Use the correct product for the environment and pressures present. See technical data or product specifications for
limitations. If you are unsure, discuss your needs with your Daniel representative.
•Inform and train all personnel in the proper installation, operation, and maintenance of this product.
•To ensure safe and proper performance, only informed and trained personnel should install, operate, repair and maintain
this product.
•Verify that this is the correct instruction manual for your Daniel product. If this is not the correct documentation, contact
Daniel at 1-713-827-6314. You may also download the correct manual from: http://www.daniel.com.
•Save this instruction manual for future reference.
•If you resell or transfer this product, it is your responsibility to forward this instruction manual along with the product to the
new owner or transferee.
•ALWAYS READ AND FOLLOW THE INSTALLATION, OPERATIONS, MAINTENANCE AND TROUBLESHOOTING MANUAL(S) AND
ALL PRODUCT WARNINGS AND INSTRUCTIONS.
•Do not use this equipment for any purpose other than its intended service. This may result in property damage and/or
serious personal injury or death.

Product operation (Personnel):
•To prevent personal injury, personnel must follow all instructions of this manual prior to and during operation of the
product.
•Follow all warnings, cautions, and notices marked on, and supplied with, this product.
•System should be designed to avoid over pressure conditions or exceeding maximum safe flow rate if meter losses
measurement.
•Verify that this is the correct instruction manual for your Daniel product. If this is not the correct documentation, contact
Daniel at 1-713-827-6314. You may also download the correct manual from: http://www.daniel.com.
•Read and understand all instructions and operating procedures for this product.
•If you do not understand an instruction, or do not feel comfortable following the instructions, contact your Daniel
representative for clarification or assistance.
•Install this product as specified in the INSTALLATION section of this manual per applicable local and national codes.
•Follow all instructions during the installation, operation, and maintenance of this product.
•Connect the product to the appropriate pressure and electrical sources when and where applicable. Never operate meter
above the maximum working pressure stated on the nameplate.
•Ensure that all connections to pressure and electrical sources are secure prior to and during equipment operation.
•Use only replacement parts specified by Daniel. Unauthorized parts and procedures can affect this product's performance,
safety, and invalidate the warranty. “Look-a-like” substitutions may result in deadly fire, explosion, release of toxic
substances or improper operation.
•Save this instruction manual for future reference.

Notice
THE CONTENTS OF THIS PUBLICATION ARE PRESENTED FOR INFORMATIONAL PURPOSES ONLY, AND WHILE EVERY EFFORT HAS
BEEN MADE TO ENSURE THEIR ACCURACY, THEY ARE NOT TO BE CONSTRUED AS WARRANTIES OR GUARANTEES, EXPRESSED OR
IMPLIED, REGARDING THE PRODUCTS OR SERVICES DESCRIBED HEREIN OR THEIR USE OR APPLICABILITY. ALL SALES ARE GOVERNED
BY DANIEL'S TERMS AND CONDITIONS, WHICH ARE AVAILABLE UPON REQUEST. WE RESERVE THE RIGHT TO MODIFY OR IMPROVE
THE DESIGNS OR SPECIFICATIONS OF SUCH PRODUCTS AT ANY TIME.
DANIEL DOES NOT ASSUME RESPONSIBILITY FOR THE SELECTION, USE OR MAINTENANCE OF ANY PRODUCT. RESPONSIBILITY FOR
PROPER SELECTION, USE AND MAINTENANCE OF ANY DANIEL PRODUCT REMAINS SOLELY WITH THE PURCHASER AND END-USER.
TO THE BEST OF DANIEL'S KNOWLEDGE THE INFORMATION HEREIN IS COMPLETE AND ACCURATE. DANIEL MAKES NO
WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE WITH RESPECT TO THIS MANUAL AND, IN NO EVENT, SHALL DANIEL BE LIABLE FOR ANY INCIDENTAL,
PUNITIVE, SPECIAL OR CONSEQUENTIAL DAMAGES INCLUDING, BUT NOT LIMITED TO, LOSS OF PRODUCTION, LOSS OF PROFITS,
LOSS OF REVENUE OR USE AND COSTS INCURRED INCLUDING WITHOUT LIMITATION FOR CAPITAL, FUEL AND POWER, AND CLAIMS
OF THIRD PARTIES.
PRODUCT NAMES USED HEREIN ARE FOR MANUFACTURER OR SUPPLIER IDENTIFICATION ONLY AND MAY BE TRADEMARKS/
REGISTERED TRADEMARKS OF THESE COMPANIES.

Warranty and Limitations
1. LIMITED WARRANTY: Subject to the limitations contained in Section 2 herein, Daniel Measurement & Control, Inc. (“Daniel”)
warrants that the licensed firmware embodied in the Goods will execute the programming instructions provided by Daniel, and that
the Goods manufactured by Daniel will be free from defects in materials or workmanship under normal use and care and Services
will be performed by trained personnel using proper equipment and instrumentation for the particular Service provided. The
foregoing warranties will apply until the expiration of the applicable warranty period. Goods are warranted for twelve (12) months
from the date of initial installation or eighteen (18) months from the date of shipment by Daniel, whichever period expires first.
Consumables and Services are warranted for a period of 90 days from the date of shipment or completion of the Services. Products
purchased by Daniel from a third party for resale to Buyer (“Resale Products”) shall carry only the warranty extended by the original
manufacturer. Buyer agrees that Daniel has no liability for Resale Products beyond making a reasonable commercial effort to
arrange for procurement and shipping of the Resale Products. If Buyer discovers any warranty defects and notifies Daniel thereof in
writing during the applicable warranty period, Daniel shall, at its option, correct any errors that are found by Daniel in the firmware
or Services or repair or replace F.O.B. point of manufacture that portion of the Goods or firmware found by Daniel to be defective, or
refund the purchase price of the defective portion of the Goods/Services. All replacements or repairs necessitated by inadequate
maintenance, normal wear and usage, unsuitable power sources or environmental conditions, accident, misuse, improper
installation, modification, repair, use of unauthorized replacement parts, storage or handling, or any other cause not the fault of
Daniel are not covered by this limited warranty, and shall be at Buyer's expense. Daniel shall not be obligated to pay any costs or
charges incurred by Buyer or any other party except as may be agreed upon in writing in advance by Daniel. All costs of dismantling,
reinstallation and freight and the time and expenses of Daniel's personnel and representatives for site travel and diagnosis under
this warranty clause shall be borne by Buyer unless accepted in writing by Daniel. Goods repaired and parts replaced by Daniel
during the warranty period shall be in warranty for the remainder of the original warranty period or ninety (90) days, whichever is
longer. This limited warranty is the only warranty made by Daniel and can be amended only in a writing signed by Daniel. THE
WARRANTIES AND REMEDIES SET FORTH ABOVE ARE EXCLUSIVE. THERE ARE NO REPRESENTATIONS OR WARRANTIES OF ANY
KIND, EXPRESS OR IMPLIED, AS TO MERCHANTABILITY, FITNESS FOR PARTICULAR PURPOSE OR ANY OTHER MATTER WITH RESPECT
TO ANY OF THE GOODS OR SERVICES. Buyer acknowledges and agrees that corrosion or erosion of materials is not covered by this
warranty.
2. LIMITATION OF REMEDY AND LIABILITY: Daniel shall not be liable for damages caused by delay in performance. The remedies of
Buyer set forth in this agreement are exclusive. In no event, regardless of the form of the claim or cause of action (whether based in
contract, infringement, negligence, strict liability, other tort or otherwise), shall Daniel's liability to Buyer and/or its customers
exceed the price to Buyer of the specific goods manufactured or services provided by Daniel giving rise to the claim or cause of
action. Buyer agrees that in no event shall Daniel's liability to Buyer and/or its customers extend to include incidental, consequential
or punitive damages. The term “consequential damages” shall include, but not be limited to, loss of anticipated profits, revenue or
use and costs incurred including without limitation for capital, fuel and power, and claims of Buyer's customers.

Contents
Chapter 1 Dimensions and specifications of the meter ......................................................................1
1.1 Dimensions of the "PT" Meter ......................................................................................................... 1
1.2 Specifications for "PT" Meters ......................................................................................................... 3
1.3 Approvals .......................................................................................................................................7
Chapter 2 Installation and initial operation .......................................................................................9
2.1 Installation of the meter .................................................................................................................9
2.2 Daniel Method of aligning meter tube flange to "PT" Meter flange ................................................10
2.3 Meter tubes ..................................................................................................................................10
2.4 Meter tubes with straightening vanes .......................................................................................... 11
2.5 Back pressure ............................................................................................................................... 12
2.6 Viscous fluids ............................................................................................................................... 13
Chapter 3 Instrumentation of the turbine meter .............................................................................15
3.1 Connect the turbine meter to the Readout ...................................................................................15
3.1.1 Pickup coil ..................................................................................................................... 15
3.1.2 Pre-amplifier ..................................................................................................................15
Chapter 4 General information about the meter ............................................................................. 19
4.1 Pack and ship the "PT" ...................................................................................................................19
4.2 Service and storage ...................................................................................................................... 19
Chapter 5 Meter Disassembly .........................................................................................................21
5.1 Disassembly for 3" through 24" PT Meter ...................................................................................... 21
Chapter 6 Meter assembly ..............................................................................................................37
6.1 Assembly for 3" through 24" PT Meter .......................................................................................... 37
Chapter 7 Inspection ...................................................................................................................... 51
7.1 Inspection of the PT Meter ........................................................................................................... 51
Contents
Installation and maintenance instructions i

Contents
ii "PT" Liquid Turbine Meters

1 Dimensions and specifications of the
meter
Topics covered in this chapter:
•Dimensions of the "PT" Meter
•Specifications for "PT" Meters
•Approvals
1.1 Dimensions of the "PT" Meter
NOTICE
Daniel™ "PT" Meters, preamplifier assemblies and Model GMPA-H-24 outlet boxes are listed by
Underwriters Laboratories, Inc. and the Canadian Standards Association for use in hazardous
locations Class 1, Groups B, C and D, and raintight.
Dimensions approximate; do not use for detailed piping layouts.
Daniel preamplifier enclosure may be rotated to any position desired.
Dimension C may be adjusted ± 1/4".
PT Meter dimensionsFigure 1-1:
Dimensions and specifications of the meter
Installation and maintenance instructions 1

Dimensions, weight and nominal line size (1) Table 1-1:
Dimensions in inches
Weight in pounds
Nominal line size
3" 4" 6" 8" 10" 12" 16" 18" 20" 24"
150#
ANSI
A 10 12 14 16 20 24 32 36 40 48
B 7 1/2 9 11 13 1/
2
16 19 23 1/
2
25 27 1/
2
32
C 11
13/
16
12 1/
4
13 5/
16
14 1/
4
15 5/
16
16 1/
4
18 1/
2
19 3/
8
20 1/
2
22 1/
8
Weight (2) 28 45 72 105 190 335 530 720 940 1,43
5
300#
ANSI
A 10 12 14 16 20 24 32 36 40 48
B 8 1/4 10 12 1/
2
15 17 1/
2
20 1/
2
25 1/
2
28 30 1/
2
36
C 11
13/
16
12 1/
4
13 5/
16
14 1/
4
15 5/
16
16 1/
4
18 1/
2
19 3/
8
20 1/
2
22 1/
8
Weight (2) 30 60 112 150 270 440 860 1,15
0
1,40
0
2,15
0
400#
ANSI
A 10 12 14 16 20 24 32 36 40 48
B 8 1/4 10 12 1/
2
15 17 1/
2
20 1/
2
25 1/
2
28 30 1/
2
36
C 11
13/
16
12 1/
4
13 5/
16
14 1/
2
15 5/
16
16 1/
4
18 1/
2
19 3/
8
20 1/
2
22 1/
8
Weight (2) 42 68 120 180 290 470 950 1,20
0
1,42
0
2,30
0
600#
ANSI
A 10 12 14 16 20 24 32 36 40 48
B 8 1/4 10 3/
4
14 16 1/
2
20 22 27 29 1/
4
32 37
C 11
13/
16
12 1/
4
13 5/
16
15 16 1/
16
17 18 1/
2
19 3/
8
20 1/
2
22 1/
8
Weight (2) 42 88 205 300 450 580 1,25
0
1,65
0
2,10
0
3,20
0
900#
ANSI
A 10 12 14 16 20 24 - - - -
B 9 1/2 11 1/
2
15 18 1/
2
21 1/
2
22 - - - -
C 11
13/
16
13 13 5/
16
15 16 1/
16
17 - - - -
Weight (2) 78 125 255 400 625 850 - - - -
Dimensions and specifications of the meter
2 "PT" Liquid Turbine Meters

(1) Above dimensions subject to change without notice.
(2) Weight is without preamplifier assembly. Add 4 lbs. for each preamplifier assembly.
1.2 Specifications for "PT" Meters
“PT” Meter, rim and blade type, when installed with meter tube and calibrated on water.
straightening sections and
Linearity:
3" and larger:
•±0.25% normal linearity
•±0.5% over extended minimum to extended maximum flow range
•±0.15% premium linearity
•±0.10% premium + linearity
•±0.07% premium ++ linearity
Repeatability:
±0.02% at any point throughout the extended minimum to extended maximum flow range
Pressure Drop:
At maximum flow of normal flow range on water 4 psi
Pressure Range:
ANSI 150-1500# depending upon size
Viscosity:
High viscosities will reduce flow range of meter. Consult Daniel Measurement engineers.
Pickup Coil:
Nominal open circuit peak to peak voltage output:
Blade Rimmed
Minimum flow 4.0v 5.0v
Maximum flow 0.3v 0.1v
Materials of constructionTable 1-2:
Item Standard Optional
Meter body 304SS 316SS
Flanges (slip on) Carbon steel 304SS or 316SS
Suspension 304SS 316SS
Dimensions and specifications of the meter
Installation and maintenance instructions 3

Materials of construction (continued)Table 1-2:
Item Standard Optional
Rotor blades (rim type) 304SS 316SS
Rotor blades (blade type)* 430SS Nickel 200*
Sleeve bearings Tungsten carbide Tungsten carbide
Journal bearings Tungsten carbide Tungsten carbide
Rotor hub 430SS 316SS or 304SS
Rotor rim 3"-24" 304SS 316SS
Rim buttons Mu Metal Mu Metal
Cones 304SS 316SS
Shaft 17-4 PH Heat treated stainless steel
(*) Recommended for salt water service; blade type meters with 316SS body, 316SS
suspension, 316SS cones and Nickel 200 blades
Note
Consult Flow Lifecycle engineers for Daniel unique applications.
Meter temperature limitsTable 1-3:
Size
Rotor hub materials
304SS or 316SS 430SS
3" thru 6" -50°F to +250°F* -50°F to +800°F
8" thru 12" -50°F to +800°F -50°F to +800°F
16" thru 24" -50°F to +700°F -50°F to +800°F
(*) Standard materials (all others by special design)
Standard “PT” Meter pulses per unit volumeTable 1-4:
Meter size
Design pulses
per 42 gallon
barrel
Design pulses
per gallon
Design pulses
per m3
Design output
freq. at max.
flow (HZ.)
3" BT 2,016 48.0 12,682 520
3" RT 4,620 110 29,062 1,192
4" BT 1,000 23.8 6,290 496
4" RT 3,000 71.4 18,864 1,487
6" BT 235 5.6 1,478 271
6" RT 1,000 23.8 6,290 1,150
8" RT 500 11.9 3,145 1,031
Dimensions and specifications of the meter
4 "PT" Liquid Turbine Meters

Standard “PT” Meter pulses per unit volume (continued)Table 1-4:
Meter size
Design pulses
per 42 gallon
barrel
Design pulses
per gallon
Design pulses
per m3
Design output
freq. at max.
flow (HZ.)
10" RT 250 6.0 1,572 800
12" RT 200 4.8 1,258 960
16" RT 100 2.4 629 720
18" RT 100 2.4 629 964
20" RT 100 2.4 629 1,180
24" RT 100 2.4 629 1,600
BT = Blade type
RT = Rim type
NOTICE
Output frequency is nominal for maximum normal flow. Output frequency is essentially linear
with flow so that frequency for other flow rates may be determined by ratio of flow to
maximum flow rate.
Liquid capacity table - Normal flow rangeTable 1-5:
Meter
size
Normal flow range
Minimum linear Maximum linear
GPM BPH BPD M3 PH GPM BPH BPD M3 PH
3" 55 79 1,886 12.5 650 929 22,286 148
4" 85 121 2,914 19.3 1,250 1,786 42,857 284
6" 240 343 8,229 55 2,900 4,143 99,429 659
8" 475 679 16,286 108 5,200 7,429 178,286 1,181
10" 800 1,143 27,429 182 8,000 11,429 274,286 1,817
12" 1,330 1,900 45,600 302 12,000 17,143 411,429 2,725
16" 2,140 3,057 73,371 486 18,000 25,714 617,143 4,088
18" 2,860 4,086 98,057 650 24,100 34,429 826,286 5,474
20" 3,500 5,000 120,000 795 29,500 42,143 1,011,42
9
6,700
24" 4,700 6,714 161,143 1,067 40,000 57,143 1,371,42
9
9,085
Notes:
Dimensions and specifications of the meter
Installation and maintenance instructions 5

1. Stated specifications are based on water at 60°F, with a specific gravity of 1.0 and a
viscosity of 1.0 centistokes.
2. Meters should be adequately protected from pressure pulsations and excessive
surges.
3. Generally, the "PT" Turbine should not be used in continuous service from the
normal maximum to the extended maximum flow rates. Consult Flow Lifecycle
engineers for proper sizing and consideration for Daniel products
4. All specifications are subject to change without notice as part of a continuing
program of product improvement.
5. Bi-directional meters have a linear flow range as stated in one direction of flow. The
minimum linear flow rate in the reverse direction is 20% of its normal maximum
linear flow rate.
Liquid capacity table - Extended flow rangeTable 1-6:
Meter
size
Minimum extended flow range Maximum extended flow range
GPM BPH BPD M3 PH GPM BPH BPD M3 PH
3" 36 51 1,234 8.18 800 1,143 27,429 182
4" 55 79 1,886 12.5 1,500 2,143 51,429 341
6" 156 223 5,349 35.4 3,600 5,143 123,429 818
8" 389 556 13,337 88.4 6,400 9,143 219,429 1,454
10" 664 949 22,766 151 9,800 14,000 336,000 2,226
12" 1,183 1,690 40,560 269 15,000 21,429 514,286 3,407
16" 1,400 2,000 48,000 318 22,500 32,143 771,429 5,110
18" 1,900 2,714 65,143 432 30,000 42,857 1,028,57
1
6,814
20" 2,350 3,357 80,571 534 36,900 52,714 1,265,14
3
8,381
24" 3,200 4,571 109,714 727 51,400 73,429 1,762,28
6
11,674
Notes:
1. Stated specifications are based on water at 60°F, with a specific gravity of 1.0 and a
viscosity of 1.0 centistokes.
2. Meters should be adequately protected from pressure pulsations and excessive
surges.
3. Generally, the PT Turbine should not be used in continuous service from the normal
maximum to the extended maximum flow rates. Consult Flow Lifecycle engineers
for proper sizing and consideration for Daniel products.
4. All specifications are subject to change without notice as part of a continuing
program of product improvement.
Dimensions and specifications of the meter
6 "PT" Liquid Turbine Meters

5. Bi-directional meters have a linear flow range as stated in one direction of flow. The
minimum linear flow rate in the reverse direction is 20% of its normal maximum
linear flow rate.
1.3 Approvals
Certification Description
Electrical •Outlet box certification: EExd IIB T6
•ElectroMagnetic Compatibility Directive 89/
336/ EEC
•ATEX Directive 94/9/EC
Pressure equipment PED (Directive 2014/68/EU)
Dimensions and specifications of the meter
Installation and maintenance instructions 7

Dimensions and specifications of the meter
8 "PT" Liquid Turbine Meters

2 Installation and initial operation
Topics covered in this chapter:
•Installation of the meter
•Daniel Method of aligning meter tube flange to "PT" Meter flange
•Meter tubes
•Meter tubes with straightening vanes
•Back pressure
•Viscous fluids
2.1 Installation of the meter
On installations which are required to comply with the European Union Pressure
Equipment Directive (PED) 2014/68/EU, it is the responsibility of the end user to ensure
that all Essential Safety Requirements of this directive are met.
The "PT" Meter has high resistance to shock while it is operating because of the supporting
effect of the fluid. This resistance is greatly reduced when the meter is out of the line or
inoperative.
CAUTION!
MECHANICAL EQUIPMENT DAMAGE
Great care should be taken to prevent shock.
Failure to handle the meter with care during installation, removal or shipment may result in
damage to the meter.
If sealing compound is used on piping during meter installation, use it sparingly to avoid
fouling meter parts. Absolute cleanliness of meter internals is important, and precautions
should be taken to prevent entry of foreign matter. Use a strainer upstream of the meter
tube section. Another common cause of meter malfunction, due to fouling of the rotor, is
objects left inside the pipeline.
CAUTION!
MECHANICAL EQUIPMENT DAMAGE
Flush and clean piping system prior to meter installation.
Failure to maintain absolute cleanliness of meter components may result in damage and
improper meter operation.
It is the responsibility of the end user to install the fitting in a well designed piping system
taking due regard of the following.
Installation and initial operation
Installation and maintenance instructions 9

•Internal/external pressure
•Ambient and operational temperatures
•Static pressure and mass of contents in operating and test conditions
•Traffic, wind and earth loading
•Reaction forces and moments which result from supports, attachments, piping, etc.
•Corrosion, erosion, fatigue, etc.
•Decomposition of unstable fluids
•Possible damage from external fire
2.2 Daniel Method of aligning meter tube flange to
"PT" Meter flange
Internal alignment throughout the metering section is vital to prevent offsets, steps or
gasket protrusion within the bore which could cause disturbance to the flow pattern.
Alignment is accomplished by dowel-pinning.
On all Daniel raised face flanged "PT" Meters and "PT" Meter Tubes three knock-out dowel
pin holes are drilled in each flange for alignment of the bore of the meter to the bore of the
meter tube.
On ANSI Class 150 lb. and 300 lb. meters and meter tubes where the dowel pin holes are
located tangent to the raised face, female face-type gaskets are used.
On ANSI Class 400 lb. through 2500 lb. meters and meter tubes where the dowel pin holes
are located beyond the inner bolt circle, series-type gaskets are used.
Care should be taken not to allow the gasket to protrude into the flow stream upon
installation.
It is recommended that dowel pins be removed after flange bolt-up and grease packed in
the holes to prevent rust.
2.3 Meter tubes
Experience has confirmed the necessity of adequate upstream and downstream straight
pipe adjacent to the meter. Daniel™ "PT" Meter Tubes and straightening vanes are
fabricated to proper dimensions and tolerances to assure that the flow pattern through
the meter is undisturbed by piping configuration.
The table of recommended dimensions for "PT" Meter Tubes takes into account piping
design, where swirls and disturbances are introduced by fittings, valves, etc., adjacent to
the meter tube section. The recommended lengths shown (with a straightening vane) are
for the maximum flow disturbance conditions. The illustrations show proper positioning of
straightening vanes.
Installation and initial operation
10 "PT" Liquid Turbine Meters