OfiTE 170-95 User manual

Dynamic HTHP Filter Press
With Magnetic Drive
#170-95 - 115V
#170-95-1 - 230V
Instruction Manual
Updated 6/24/2015
Ver. 2.0
OFI Testing Equipment, Inc.
11302 Steeplecrest Dr. · Houston, Texas · 77065 · U.S.A.
Tele: 832.320.7300 · Fax: [phone] · www.ote.com
©Copyright OFITE 2015

OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: [phone] / Fax: [phone] / www.ote.com 1
Intro..................................................................................................2
Description......................................................................................2
Specications .................................................................................2
Components ...................................................................................3
Safety...............................................................................................4
Setup................................................................................................5
Quick Start ......................................................................................6
Operation.........................................................................................8
Data................................................................................................14
Cell Cap Assembly .......................................................................15
Maintenance..................................................................................17
Fuses ........................................................................................17
Bearing Replacement ...............................................................18
Appendix .......................................................................................21
Mag Drive..................................................................................21
Top Cell Cap .............................................................................21
Warranty and Return Policy ........................................................22
Table of
Contents

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The OFITE High-Temperature, High-Pressure (HTHP) Dynamic lter press
measures ltration properties under varying dynamic down-hole conditions.
A motor driven shaft tted with a propeller turns at varying speeds inside a
standard 500-mL HTHP cell. Speed settings up to 3,600 RPM impart laminar
or turbulent ow to the uid inside the cell, and by varying the shaft length,
the shear stress may be increased or decreased. Other features include a
variable speed motor with RPM indicated on a digital display.
The test procedure is exactly the same as that in the conventional HTHP
ltration test. The only difference is that uid is circulating inside the cell,
while ltrate is being collected. Since the lter medium is conventional disk
material, the results are fully comparable with those of other laboratories or
for comparing historical trends.
The Dynamic Filter Press comes with two interchangeable bottom caps to
accommodate quarter inch thick ceramic disks or conventional lter paper.
Both caps have a threaded hole for the valve stem, which connects to the
100-mL back pressure receiver.
Two regulators provide both main pressure and back pressure from a single
Nitrogen source. A temperature controller maintains a constant temperature
throughout the test and a temperature display shows the cell temperature.
The Dynamic Filter Press also comes with an internal cooling system which
enables the cell to be cooled rapidly via a water or coolant connection.
- 500 mL Stainless Steel Test Cell
- Maximum Allowable Working Pressure 2,500 PSI (17.2 MPa)
- Variable Speed Motor: up to 3,600 RPM
- Digital Temperature Controller: 100° to 500°F (38° to 260°C)
- Requires a Nitrogen source of at least 2,500 PSI
Intro
Description
Specications

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Components #122-077 10 Amp Fuses, Qty: 2
#153-12 Graduated Cylinder, 100 mL × 1 mL, Glass
#154-20 Thermometer, Metal Dial, 8" Stem, Dual Scale: 50°F -
500°F / 0°C - 250°C
#170-19 Filter Paper; 2½" (6.35 cm)
#170-35 Adjustable Wrench, 6"
#170-50-075 Mag Drive, ¼" HP, ¾" NPT,
#170-50-078 Magnetic Pickup, HTHP Dynamic
#170-53 Filter Disk, 2½", Ceramic
#170-67 Propeller, 1½", Stainless Steel
#170-68 Propeller, 2", Stainless Steel
#170-95-313 Spanner Wrench
#170-95-317 4" Shaft Extension
#171-10 Back Pressure Receiver, 100 mL
#171-190-028 Cell Assembly Stand
#171-23-1 T.C. Safety Pin W/Lanyard 3"
#171-196-316 Cell Assembly, HTHP System, Mud Dynamic W/Mag
#120-910-028 O-ring, Viton 75D
#130-81-040 Retaining Ring, Qty: 2
#170-13-3 O-ring for Cell, Viton, Qty: 4
#170-16 Valve Stem, Qty. 2
#170-17 O-ring,for Valve Stem, Qty: 4
#171-190-020-316 Cell Body, 10.5" D.E. 316
#171-190-021 Adapter, Dynamic, Valve Stem
#171-190-023 Cap Screw, Qty: 2
#171-190-027 Plug, Rupture, 5,500 PSIG
#171-190-029 Cap Wrench, Bar
#171-190-030-S Cap, End, 60 Mesh, Out, 316
#171-190-034-S Cap, End, Ceramic Disk, Out
#171-190-035-S Cap, Top, End, Dynamic Mag
#171-190-041 Adapter, Dynamic, ¼" NPT
#170-190-057 O-ring, -008, VW155 90D, Qty. 4
#170-190-058 O-ring, -011, VW155 90D
#170-190-060 O-ring, -228, VW155 90D, Qty. 4
Optional:
#171-196-316 Threaded Filter Press Cell Assembly, 500mL,
.316 SS.
#171-196-H Threaded Filter Press Cell Assembly, 500mL,
Hastelloy
#171-196-S Threaded Filter Press Cell Assembly, 500mL, SS
#170-58 ½" Shaft Extension
#170-59 1" Shaft Extension
#170-60 1½" Shaft Extension

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Safety Read this manual carefully before attempting to use the equipment. Improper
use can result in injury or damage to the equipment.
Temperature
The heating jacket, test cell, and valve stems will be very hot during testing.
Handle these components with care. Never touch hot components without
wearing protective clothing.
At elevated temperatures, the uid in the test cell will expand. Never ll the
test cell completely with uid. Always leave some void space to allow for
thermal expansion. Refer to page 9 for recommended ll volumes.
Pressure
Always pressurize with either Carbon Dioxide or Nitrogen. Do not use Nitrous
Oxide (NO2), Oxygen (O2), or compressed air. These gasses are dangerous
at elevated temperatures.
#171-196-316 Threaded, 500 mL., Cell Assembly, .316 Stainless Steel
Maximum Allowable Working Pressure 4,000 PSI
#171-196-H Threaded, 500 mL., Cell Assembly, Hastelloy
Maximum Allowable Working Pressure 5,000 PSI
#171-196-S Threaded, 500 mL., Cell Assembly, Stainless Steel
Maximum Allowable Working Pressure 5,000 PSI
Equipment
Inspect all o-rings before every test. Discard any that show signs of damage
or wear. Looks for nicks, cuts, or brittle o-rings. Two sets of o-rings are
included with the Filter Press. The rst set is made from Viton 75D. These
o-rings are black and should be used for tests up to 400°F only. The second
set is made from Viton 90D. These o-rings are green and should be used for
tests up to 500°F.
The Safety Pin includes an attached lanyard. The lanyard secures the pin and
prevents it from accidentally disengaging from the valve stem and pressure
assembly. Always secure the pin with the lanyard.
Quick-Connect
Fitting
Safety Pin
Back Pressure
Receiver
Safety Retainer Pin with Lanyard
(# 171-23-1)

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Setup 1. Carefully unpack the units and place them on a stable surface near a
power outlet. Unpack and unwrap each of the component pieces.
2. Make sure all switches are off and both regulators are backed off
(counterclockwise) completely.
3. Connect a Nitrogen source to the port to the back of the control box.
4. Plug the instrument into a suitable power source.
ElectricalNitrogen
Chill Input Chill Output
5. Connect the input and output to a chiller/water source prior to heating the
cell if the water cooling method will be used upon completion of the test.

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Quick Start 1. Preheat the heating jacket to 10°F (6°C) above the test temperature. The
pilot light will turn on at the target temperature.
2. Inspect all o-rings. Replace any that show signs of damage or wear.
3. Apply grease to all o-rings.
4. Assemble both cell caps. Place an o-ring in the groove around the cap.
5. Place an o-ring in the groove inside the cell.
6. Place a circle of lter paper or ceramic disk on top of the o-ring.
7. Screw the outlet cell cap into the cell and tighten it completely.
8. Screw a valve stem into the outlet cell cap and tighten it completely.
9. Place an o-ring in the groove inside the cell.
10. Place an o-ring in the groove around the cell cap.
11. Pour mud in the cell leaving the proper amount of void space.
See page 9.
12. Screw the inlet cell cap with the mag drive attached into the cell. Tighten it
completely.
13. Screw a valve stem into the inlet cell cap and tighten it completely.
14. Place the cell in the heating jacket. Rotate the cell until it locks.
15. Install the cell temperature thermocouple into the cell body.
16. Plug the mag drive into the port on the back of the control box.
17. Connect the manifold block to the top valve stem and secure it with the
safety pin.
18. Connect the back pressure receiver to the bottom valve stem and secure it
with the safety pin.
19. Adjust both regulators to the target back pressure for the test.
20. Open the top valve stem ½ turn.
21. After heat time, increase the top pressure to 500 PSI above the back
pressure.
22. Open the bottom valve stem to initiate ltration.

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23. Collect ltrate and record the volume at 1, 7.5, and 30 minutes.
24. After 30 minutes, close both valve stems.
25. Turn both regulators counterclockwise.
26. Open the outlet valve on the back pressure receiver to collect any
remaining ltrate.
27. Open the valve on the manifold block to release any remaining pressure.
28. Remove the manifold block and back pressure receiver.
29. Begin cooling by opening the cooling valve on the back of the jacket.
30. Remove the cell from the heating jacket. Keep the outlet side pointing
down.
31. When the cell is cool, slowly open the valve stem on the inlet side to
release the pressure.
32. Unscrew the outlet cell cap.
33. Wash the lter cake and record the thickness to the nearest 1/3 2 ".
34. Clean and dry all components.

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Operation 1. Turn the “Power” and “Heat” switches on.
2. Connect the temperature controller extension cable from the back of the
control box to the back of the lter press.
3. Use the up and down arrows on the “Temperature Controller” set the
temperature to 10°F (6°C) above the desired test temperature.
4. Inspect all o-rings. Replace any that show signs of damage or wear.
Looks for nicks, cuts, or brittle o-rings. Replace all o-rings after any test
above 350°F (176.7°C). Place a thin lm of silicone grease on all o-rings.
Temperature Controller
Tachometer
Cell Temperature
Speed Control Knob
Main Pressure
Back Pressure
5. Place an o-ring (#170-13-3) on the shoulder inside the cell body on the
end marked “OUT”. Place another o-ring in the groove around the cell
cap.
6. Place a circle of lter paper or ceramic disk on top of the cell o-ring.
Gently push the paper or disk downward so it contacts the o-ring without
the paper binding or pinching.
7. Secure the cell cap with the cap wrench bar (#171-190-029).
8. Place an o-ring in each of the two o-ring grooves on both valve stems.
9. Screw one valve stem into the outlet cell cap. Tighten the valve stem
completely.

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10. Invert the cell body and carefully pour the sample into the cell. Leave
enough void space for thermal expansion (see chart below). Consider the
volume of the shaft and propeller for additional void space.
14. Secure the top cap assembly in place with the spanner wrench
(#170-95-313).
15. Screw a valve stem into the cell cap and tighten it completely.
API Recommended Void Space
Fluid / Temperature Void Space Fluid Volume
Water-based drilling uid. < 300°F 0.6" (1.5 cm) 405 mL
Water-based drilling uid. < 300°F 1.5" (4.0 cm) 353 mL
Oil-Based Drilling Fluid. Any temperature. 1" (2.5 cm) 382 mL
11. Place an o-ring on the shoulder inside the cell body. Place another o-ring
on the cell cap.
Be careful not to spill uid on the o-ring inside the cell.
12. Unscrew the magnetic drive from the cell cap. Replace the Teon tape
around the threads on the magnetic drive. Screw the drive back into the
cell cap.
13. Lower the propeller and propeller shaft down into the test cell.

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16. Place the cell in the heating jacket. Rotate the cell so that the pin in
the bottom of the heating well seats into the hole in the bottom of the
cell. This will anchor the cell inside the well and prevent the cell from
rotating as the valve stems are opened and closed. Once anchored, you
may rotate the cap, mag drive, or stem to better orient the valve and/or
thermocouple.
17. Place the cell temperature thermocouple into the thermometer well in the
cell.
The reading from the thermocouple will display on the “Cell Temperature”
Eurotherm. Allow the cell to heat for one hour. Start a 60 minute timer
now.
Control
Thermocouple
Bleeder Valve
Manifold Block
Valve Stem
Safety Pin
18. Plug the magnetic drive into the port on the back of the control box.
Temperature
Controller
Cell Temperature
Thermocouple
Pressure
Mag Drive
Quick-Connect
Fitting

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19. Connect the manifold block to the top valve stem and lock it in place with
the safety pin. Make sure the bleeder valve is closed.
The safety pin includes an attached lanyard. The lanyard secures the pin
and prevents it from accidentally disengaging from the valve stem and
pressure assembly. Always secure the pin with the lanyard.
20. Connect the pressure hose from the manifold block to the quick-connect
tting on the back of the Control Box.
21. Place the back pressure receiver on the bottom valve stem and lock it in
place with the safety pin. Make sure the bleeder valve is closed.
22. Connect the pressure hose from the back of the Control Box to the quick-
connect tting on the back pressure receiver.
Quick-Connect
Fitting
Safety Pin
Back Pressure
Receiver
23. Keeping the valve stems closed, adjust the two regulators to the
recommended back pressure for your test (refer to the chart on the next
page).
The upper and lower limits of the test pressure differential are determined
by the test temperature. As this temperature exceeds 212°F (100°C),
the back pressure must be increased in order to prevent vaporization of
the ltrate. The 500 PSI differential pressure must be maintained, so the
top pressure will have to be increased accordingly. The table on the next
page shows the pressures recommended for various test temperatures.
24. Open (loosen) the top valve stem ½ turn to pressurize the sample.
Maintain this pressure on the uid until the temperature is stabilized.
25. Turn the “Motor” switch on.
Always make sure the Speed Control Knob is set to 0 before turning
on the motor switch.

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Recommended Minimum Back Pressure
Test Temperature Vapor Pressure Minimum Back Pressure
°F °C PSI kPa PSI kPa
212 100 14.7 101 100 690
250 121 30 207 100 690
300 149 67 462 100 690
350 177 135 932 160 1,104
400* 204 247 1,704 275 1,898
450* 232 422 2,912 450 3,105
500* 260 680 4,692 700 4,830
*For tests above 400°F, use Teon o-rings.
26. Set the mixing speed using the speed control knob on the control box.
The current speed of the motor will be displayed on the tachometer.
27. After the one-hour heat time, increase the “Main Pressure” to 500 PSI
(3,448 kPa) more than the back pressure.
28. Open (loosen) the bottom valve stem ½ turn to initiate ltration.
29. To collect ltrate, carefully open the ball valve on the bottom of the back
pressure receiver while holding a graduated cylinder up to the valve port.
Close the valve immediately after the pressure begins to decrease and
the ltrate is collected.
Collect ltrate at 10 seconds, 1 minute, 7.5 minutes, and 30 minutes.
The initial 10 second collection is precautionary in nature, as a uid
with little ltration properties may ll up the 15 mL receiver tube almost
immediately, potentially damaging the regulator. Do not record the 10
second collection as a separate notation, but do record the volume
collected at the other time intervals. At the end of the test, close (tighten)
the top and bottom valve stems to seal off the cell.
30. Turn the regulators counterclockwise to close off the ow of pressurized
gas.
31. Set the “Temperature Controller” to 0 and turn off the “Heat” switch.
32. Turn the “Motor” switch off and unplug the magnetic drive.
33. Begin cooling by opening the valve on the back of the heat jacket a
quarter-turn.
34. Allow the ltrate to cool for at least ve minutes. Open the outlet valve
on the back pressure receiver to collect all of the ltrate in the graduated
cylinder.

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35. Open the bleeder valve on the upper manifold block to release any
remaining pressure in the line.
36. Remove the manifold block and back pressure receiver. Drain any
residual ltrate collected in the receiver into the graduated cylinder.
If the cooling system has been connected, the cell can be cooled faster
by using a chiller or water and opening the back valve quarter turn
37. Remove the cell from the heating jacket after once again checking that
the cell valve stems are tightly closed. Allow the cell to cool to room
temperature.
Pressure inside the sample cell will still be approximately 500 PSI
(3,450 kPa). Keep the cell upright and cool it to room temperature
before disassembling. The cell must be cool for at least one hour
at room temperature or at least 10 minutes in cool water before
loosening and removing the cell cap.
38. Using extreme care to save the lter paper and deposited cake, place the
cooled cell upright with the outlet or lter side down. Open (loosen) the
inlet valve stem very slowly to bleed off pressure from the cell body.
Pressure cannot be relieved from the cell by opening the outlet valve
stem because the lter cake will seal off the cell. It is a good idea to open
the valve stem with the cell inside a sink or with a rag over the valve stem
in order to catch any liquid that might be ejected.
39. Loosen the valve stem and unscrew and remove the outlet cell cap. Use
the supplied cell cap wrench to loosen the threads.
40. Carefully remove the lter paper or ceramic disk and deposited cake. Be
careful not to damage the lter cake. Carefully wash any residual uid
from the surface of the lter cake.
41. Pour out the test uid.
42. Clean and dry the apparatus thoroughly after each use. Inspect all of the
o-rings and replace any that show signs of wear or damage.

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Data Filtrate Volume
The HTHP lter press has a ltration area of 3.55 in2 (22.9 cm2). This is half
the area of a standard ltration test, which is 7.1 in2 (45.8 cm2). To compare
the results of this test to a standard ltration test, you double the total ltrate
volume collected.
VS= 2 (V30)
Spurt Loss (Optional):
Spurt Loss is the amount of ltrate collected before the lter cake has had a
chance to form and is expressed in millimeters. To calculate the spurt loss,
use the following equation:
V1= 2 [V7.5- (V30 - V7.5)] = 2 (2V7.5 - V30) = 4V7.5 - 2V30
Where:
Vs = Standard Filtrate Volume (mL)
V1 = Spurt Loss
V7.5 = Filtrate volume collected after 7.5 minutes (doubled)
V30 = Filtrate volume collected after 30 minutes (doubled)
Filter Cake
Wash the lter cake on the paper with a gentle stream of water. Measure and
report the thickness of the lter cake to the nearest 1/3 2 " (0.8 mm). A ruler with
the “zero mark” at the very edge of the ruler is useful here. Cake descriptions
may be subjective and such notations such as hard, soft, rubbery, and ne,
etc. convey adequate information on cake quality.

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Cell Cap
Assembly
1. Choose the appropriate cap for your test:
- 171-190-030-S - Outlet, with 60 Mesh Screen for Filter Paper
- 171-190-031-S - Inlet, with 60 Mesh Screen
- 171-190-034-S - Outlet, Scribed for Ceramic Disks
2. Place the locking ring (#171-190-023) around the cap.
3. Place the retaining ring (#130-81-040) into the groove around the outside
of the cap. Make sure it engages completely around the circle.
The cap should turn freely inside the locking ring.
4. Place an o-ring in the port in the cap. Wrap a rupture disk (#171-190-027)
with nickel anti-seize tape (#171-190-040) and screw it into the port.
Rupture Disk
(#171-190-027)
Retaining Ring
(#130-81-040) Cap
Locking Ring
(#171-190-023)
Rupture Disk
O-ring
Cap
Retaining Ring
Locking Ring

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Top Cell Cap Assembly
1. Wrap a rupture disk (#171-190-027) with Teon tape and screw it into the
¼" NPT Adapter (#171-190-041).
2. Wrap the threads of the NPT adapter with Teon® tape and install the
adapter and rupture disk into one side of the cap.
3. Wrap the threads of the Valve Stem Adapter (#171-190-021) and install
the Adapter into the other side of the cap.
See page 21 to see an assembled photo of the top cell cap.
Rupture Disk
(#171-190-027)
Retaining Ring
(#130-81-040)
Top End Cap
(#171-190-035-S)
Locking Ring
(#171-190-023)
¼" NPT Adapter
(#171-190-041)
O-ring, Viton
(#170-13-3)
Valve Stem Adapter
(#171-190-021)
Valve Stem
(#170-16)

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Maintenance
Fuses
1. The instrument has two fuses that protect the electronic components
which are located on the power cord receptacle:
10 Amp fuses (#122-077), Qty. 2

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3. Carefully tap the bearings and spacer using the supplied bearing removal
tool from one end of the cap to push them all out.
4. Inspect bearings for wear and tear.
Maintenance
Bearing Replacement
1. Remove the retaining ring from the NPT end of the shaft assembly with a
small at head screwdriver.
2. Unscrew the upper hex on the shaft to access bearings inside cap
assembly.

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5. If necessary, reinstall the bearings while maintaining proper orientation of
the springs. The direction of rotation is clockwise when viewed from the
top of the drive so they must resist the rotation and be left to right when
viewed from the side.
6. Reinstall the bearings one by one with the correct spring orientation very
carefully with the bearing removal tool.
Top
Bottom