For maximum heat removing performance and efficiency


The Tate Andale Type 202 Oil Cooler is a superior unit providing optimum oil cooling capability and economy plus maximum ease of maintenance. These unique oil coolers enable the tube bundle to be easily removed for servicing without breaking any of the piping connections.

Availability of a full range of body sizes and baffle arrangements assures you of the ideal oil cooler for your specific requirements. Further details on Tate Andale Type 202 Oil Coolers are given on the reverse side. We welcome your most critical evaluation of these performance–proven coolers.

For maximum oil cooling efficiency at pressures to 125 psig and fluid temperatures to 200°F., Tate Andale offers a complete range of Type 202 Oil Coolers. These rugged units feature Tate Andale’s exceptional cooler design, which permits the tube bundle to be removed for servicing while all piping connections – both water and oil – remain intact. This unique feature assures ease of maintenance without lengthy downtime. In addition, Tate Andale Type 202 Oil Coolers can be inspected for leakage without disassembling the unit since all gasketed or packed joints are visible.

The water normally flows through the tubes and the oil flows through the shell (around the tubes) with the baffles directing the oil back and forth across the tubes. The baffle spacing is carefully selected to assure optimum oil velocity for efficient heat transfer.

Superior Design and Construction The Type 202 Oil Cooler has an externally packed floating tube sheet with synthetic rubber “O” rings held in the counterbore of the shell by a stud bolted adjustable gland. The “O” rings seal the clearance between the shell and the floating tube sheet and permit the bundle assembly to expand and contract freely with changes in temperature and without any oil leakage. This design affords positive protection against intermixing of the oil and water through the packing. If packing leakage should occur, it will take place externally and not into the water. These Tate Andale oil coolers have 3/8” O.D. x 18 BWG seamless, cold drawn tubes in a machined bundle. If desired, Type 202 oil coolers can be furnished with 5/8” O.D. tubing. The tube ends are expanded into carefully machined aluminum bronze tube sheets and tested to 1-1/2 times the working pressure to assure leak proof operation. Every type 202 component is precision machined to assure years of trouble free performance and exact replication of parts if ever required. Typical Performance Oil (shell side) Viscosity 500 SSU at 100°F. Enters Cooler at 145°F. Pressure Loss 10 psi Water (tube side) Enters Cooler at 85°F. Results of Actual Tests. Note that this tabulation covers only seven of the thirty coolers, and only one of the many combinations of conditions met with in application of coolers to specific problems. This combination of conditions is typical, as to oil viscosity specification, oil entering temperature, oil pressure drop, and water entering temperature. Performances of these seven coolers indicate the range of capacities in the thirty coolers. Statements in this tabulation are records of actual tests. They are only a small fraction of the Test Information that is available here as basis for selection of the most economical cooler. A Selection of Materials Highest quality materials to standard specifications are used throughout Type 202 Oil Coolers. Generally, these Tate Andale coolers feature cast iron pressure parts with bronze internal components. For example, an oil cooler using fresh water as the cooling medium employs cast iron shell and heads, copper tubes with aluminum bronze tube sheets and brass baffles. For salt or brackish water, tubes of admiralty metal or 90/10 copper-nickel are suggested. All-bronze construction is available for special applications. The type of water to be used and/or tube material preference should be specified. Application Versatility Although these oil coolers are designed primarily for oil cooler application, the exceptional performance they provide has extended their use to other services, as well. Type 202 units have been widely used as water-to-water heat exchanges, and have been employed in chemical applications with equally effective operation. A Full Range of Sizes and Baffle Arrangements Tate Andale offers Type 202 Oil Coolers in a wide range of sizes, with lengths from 20" to 92". (For smaller units, see Bulletin 281 on Type 202 Compact Oil Coolers). Each cooler is available with any one of several baffle arrangements to assure that your oil cooling requirements will be most effectively met. The table below lists only a part of the complete Type 202 Oil Coolers line. The lettered units and the numbered models - the larger frame coolers - are built on order to standard specifications. Regardless of your oil cooling requirements, there is a Tate Andale Type 202 Oil cooler that meets those needs. We invite your further inquiry.

Oil Coolers (with tubes 3/8” O.D. 18 BWG)
Permanent Pipe-Connection Type 202
A Bolted Assemblage; Five Standard Parts; a Tube Bundle and Four Castings

Tube Bundle: A permanent assembly; Tubes 3/8: o.d., 18 bwg, round, straight, seamless cold-drawn copper; passed through holes drilled in turned brass Baffles; ends expanded into holes drilled in aluminum-bronze Tube Sheets.

Shell: Cast iron, bored throughout to a standard diameter 1/32" larger than the standard turned diameter of Baffles. Heads (water circuit): Cast iron. Gland: (which establishes oil seal at floating end) is a bronze casting.

The Coolers of This Group are designed for the use of FRESH water as a cooling medium.

The Thirty Coolers of this Series Size is indicated by LETTER. Baffle Spacing indicated by NUMBER

Performance Guarantees. Each one of the thirty coolers listed in this series is an exact duplicate in every detail of one of the test coolers on whose performance its guarantees are based. Its parts are interchangeable with those of the test cooler.

Typical Cooler Performances
Oil
Water Viscosity 500 SSU at 100°F.
Enters Cooler at 145°F.
Pressure Loss 10 lb. sq. in.
Enters Cooler at 85°F.

Results of Actual Tests.
Note that this tabulation covers only seven of the thirty coolers, and only one of the many combinations of conditions met with in application of coolers to specific problems. This combination of conditions is typical, as to oil viscosity specification, oil entering temperature, oil pressure drop, and water entering temperature.

Confining Oil and Water to Their Designed Circuits.

In each of these coolers there are two groups of seals, different in character and function. One group seals against leakage to atmosphere only (outside leakage of oil and water). Of these seals, four are on water (all gasketed); and two are on oil (one gasketed, and one a ring-seal in a stuffing box). These six seals are replaceable. Their leakage, at any time, is visible to the operator; as are the studs for their tightening if required.

The second group seals against leakage of oil to water, and of water to oil. These are the metal-to-metal seals, made tight by expanding tubes into holes in forged aluminum-bronze tube sheets. There is one such seal at each end of each tube (112 in the B cooler; 228 in the R cooler). In an assembled cooler they are not visible to the operator.

Injurious Stresses Prevented

Complete and continuous separation between oil and cooling water depends upon (a) the character of the tube-bundle's construction, and on (b) the tube bundle's complete protection from destructive stress from its own expansion and contraction, or from expansion or contraction of the shell which houses it.

In an oil cooler, when operating, the temperature of the tube bundle varies with that of the cooler water, the temperature of the shell varies with the temperature of the oil.

The tube bundle and the shell are rigid structures; they change length frequently in independently, due to changes in oil temperature and water temperature.

At each end of the cooler the seal against oil leakage to the atmosphere is between the shell casting and a tube sheet.

At main end of cooler the tube bundle is fastened firmly to the shell (gasket between main tube sheet and shell flange). At the other end the seal between oil and atmosphere is a sliding seal; a neoprene seal ring is held in the counterbore in shell by a studded gland, and is pressed against the sidewall of the tube bundle's tube sheet; which floats freely in that seal.

After testing for pressure-tightness every Tate Andale Oil Cooler is disassembled and the parts are cleaned by degreasing in an organic solvent vapor, then reassembled and sealed against contamination.

LIST OF MATERIAL

1. Shell, Cast Iron Bored true straight, true round, to very exact standard dimensions, for the smallest clearances practical between Shell wall and Baffle edges. All surfaces exposed to oil are machine finished, free of foundry sand. Connections for Thermometers and Pressure Gauges, on either Oil or Water connections, or both, will be drilled, tapped and plugged, if specified by Customer when ordering ¾” p.t. Bronze plug, machine threaded. IC Locating Pin, Cold rolled steel. Positions Main Tube Sheet at Shell flange. 2. Main Head. Cast Iron. Paths of inlet, water and of outlet water are separated by its partition. 2A. Stud and Nut. Cold rolled steel. Machine threaded. 2B.. Main Tube Sheet Gasket on Oil. Between Main Tube Sheet and Shell. 2C. Gasket on Water Inlet or Outlet. Between Shell and Main Head. (Not show in assembly sketch. Shown in Illustration of cooler opened). 2D. Main Head Gasket on Water. Between Main Head and Main Tube Sheet, and on the partition between Inlet water and outlet water. 3. Floating Head. Cast Iron. Type Y. 3A.. Stud and Nut. Cold rolled steel. Machine threaded. 4A- Main Tube Sheet Gasket on Oil. Between Main Tube Sheet and Shell. 4A- Gasket on Water Inlet or Outlet. Between Shell and Main Head. (Not show in assembly sketch. Shown in Illustration of cooler opened). 4S. Main Head Gasket on Water. Between Main Head and Main Tube Sheet, and on the partition between Inlet water and outlet water. 10A. Pipe Plug. Bronze. For Vent or Drain on Oil side. Machine threaded. For ½” pt. On Oil Side the Vents or Drains are always located on the shell, in either of the Positions shown. 10B. Pipe Plug. Bronze. For Vent or Drain on Water side. Machine threaded. For ½” p.t. On Water side the positions of Vents or Drains are determined by the Construction details of the various cooler sizes. In Ordering Parts. Every Tate Andale Oil Cooler has the name Tate Andale cast on the shell and bears the name plate of either the builder of the machine it serves or of Tate Andale Company. The plate shows the individual serial number identifying that specific unit. In any order or correspondence please mention that identifying number. As an added check please give any additional information that appears on the name plate.

8. Tube Bundle. Unit complete. Bronze, forged bronze, and admiralty metal, unless otherwise specified. All tubes are expanded the full length of the tube holes in the tube sheets. Before expansion the tubes are nearly the size of the tube holes. Expansion is completed with the smallest stretching of the tube metal’s texture that is practical; and with no approach to fatigue. Therefore there is least tendency in the tube metal to draw away later from the tube sheet metal. The unit is rugged, rigid, true straight, true round. Baffle Sheets fit in the machined Shell with very minute clearances, equal all around. Unit is tested with overpressure both ways after completion. There are five different baffle arrangements in Tube Bundle designs, for different oil velocities. Tube Bundles of the same size, with different baffle arrangements, are interchangeable in Shells of the same size. Parts for the Tube Bundle. 5 Main Tube Sheets: and 5A Floating Tube Sheet, are forged bronze. A bronze formula in which forging causes an increase in density and tensile strength; for driller, and to hold expansions strongly. Tube Sheets are machined both sides and all over before drilling. 6. Baffle Sheet Substantial gauge, rugged. Segment cut, and mortised for Baffle Strips. True Round, to exact dimensions; fitting shell wall with minute clearance. Tube Sheets and Baffle Sheets are drilled at the same time, to same jigs. Holes. In Tube Sheets are exact perpendicular and parallel. Tube holes in Baffle Sheets are only slightly larger than the Tubes. 6A 6E. Baffle Strips. They run from Main Tube Sheet to Floating Tube Sheet, whole length of Tube Bundle Mortised at correct distances to suit the designed baffle arrangement. Their mortises lock in other mortises cut at the edges of the Baffle Sheets. They throw the oil inward from the shell wall to the cooling tubes. 6B 6C 6D 6H 6J. Baffle Spacers Various exact lengths of tubes that fit closely over four or more of the cooling tubes. Their lengths are the exact distances that are to be maintained permanently between Baffle Sheet and Baffle Sheet; or between Tube Sheet and Baffle Sheet; in the various baffle Sheets firmly in position (6D shown; 6B, 6C, 6H, 6J not shown). 7. Tubes. Strictly inspected and tested before use; for defects, for straightness, roundness, diameter, wall thickness and tested by overpressure both ways.

Replacements and Changes.

All parts are made to jigs, and are interchangeable. An exact duplicate of any part can be produced at any time.

Tube bundles are the same size, in any of the five different baffle arrangements are interchangeable.

If at any later time there is a change in a machine's oil gpm - or in requirements as to oil temperature leaving cooler, or oil temperature drop, or total BTU per hour to be removed - the change may be met by inserting a tube bundle of a baffle design suited to the new requirements.

For salt water service in some cases special bronze heads are used, in which case the water connections are on the main head.



Tate Andale Oil Cooler

With Water Thought Tubes, Oil Outside Tubes. Type 202. With Type Y Floating Head

De-Insulating the Heat-Transfer Surfaces

When they were first introduced many years ago Tate Andale Oil Coolers, in their design and structure, were a distinct departure from the practice that was usual in this field. They are based on complete recognition of some facts, which until that time had not been met and dealt with thoroughly in oil cooling.

Lubricating oil develops substances that are insulative, resistant to the transfer of heat. The cooling of oil - removal of the required amount of heat from it - is, and always will be, carried on against the resistance of insulative substances that are brought and deposited by the oil itself. No matter what the shape and extent of a cooler's heat transfer surfaces may be, the insulative sludge and dirt will accumulate on them, because they are the coolest surfaces on the oil's circuit. The accumulation increases steadily. Ultimately, if it is not removed, that accumulation will reduce the cooler's heat removal capacity per degree mean temperature difference between oil and water, no matter how many square feet of cooling surface the cooler may have.

That reduction stars at the moment when a new or cleaned cooler is put into service. With a constant heat removal load coming to the cooler there will be a progressive rise in the temperature elevation at which that quantity of heat is removed from the oil. With the progressing accumulation of sludge there will be a progressing increase in the temperature of the oil supplied to the bearings.

Coolers Must Be Easily Cleanable.

For the dependability that is necessary in protecting machines, their service, and their oil, a cooler therefore must be able not merely to cool oil at a time when its surfaces are uninsulated; its design must provide for ease of freeing it from the insulative accumulations. Inasmuch as accumulated insulation could in time end a cooler's usefulness, the cooler's useful life depends on its being structurally susceptible of being opened, making its heat-transfer surfaces properly accessible for cleanings, and for inspection.

Cleaning is a task that is an inevitable, repeating and essential part of oil cooling. The more economically, conveniently and rapidly it can be done, the oftener it will be done; the smaller will be the reasons for postponing it.

Tate Andale Oil Coolers, their design and construction, are based on these principles. All oil and water connections are on the shell, none on the heads. In opening them no pipe connections are broken, no pipe fitting work is required. The design is such that insulative accumulations on the heat transfer surfaces can be removed with great thoroughness and economy.

Opening and Reclosing.

Before opening cooler shut the oil and water flow; drain oil and water sides. Remove main head, floating head, packing on water at floating end, lantern gland, and packing on oil.

Remove tube bundle. In removing and replacing tube bundle move it only in line with the shell bore; avoid injuring or bending the edges of transverse baffles.

When closing cooler see that all gaskets and backing are in good condition and flat in place. Before putting cooler back in service see that oil and water sides are fully vented.

After the cooler has been in use 6 or 8 hours retighten on gaskets and packing.

Cleaning.

Simplest method is: Hot bath; bundle horizontal in open-top tank of wood or metal; bath boiled with steam coil or steam jet; or agitated by other means. Emulsification of the sludge that is on oil side, by a mild alkali solution (for example, soda ash, tri-sodium phosphate, "Wyandotte", "Oakite" or other); with addition of a small quantity of a sulfonated fatty alcohol ("Duponol CA" or "Tergitol 4 or 08"). A practical formula is:

100	gals water
4 lbs.	Mild alkali cleanser
0.4 lb.	sulfonated fatty alcohol

Tank should be of a size to contain the tube bundle in horizontal position, with six inches clearance all around; deep enough for a bath that will cover the tube group.

A perforated pipe should be set at bottom of tank, near the sides, and with its end brought over the edge of tank, ready for steam connection.

Put in one-third the amount of water necessary to completely cover the bundle . Add the alkali and sulfonated fatty alcohol, enough for the full bath, and boil thoroughly.

Add remaining two-thirds of cold water, necessary to cover the bundle. Adding this water will bring the temperature of the solution to approximately that of the bundle. Now immerse bundle and boil two hours.

A wooden partition or grating should be put between the bundle and heating element, to prevent the bundle coming in direct contact with the steam pipe.

During the boiling turn the tube bundle slightly from time to time until it has been turned over two or three times. Add makeup so that the tube group will be always submerged.

Boiling in this solution for two hours should remove any sludge deposit that may have formed.

Remove bundle, and hose out with hot water to wash out the loosened sludge. Turn the bundle and direct the hot water jet into the tube group in the six directions made possible by the tube arrangement.

The hot water will dry off quickly from the hot metal.

For still greater certainty that no carbon or other insoluble dirt remains anywhere in the passages between tubes, after drying, blow all passages with an air nozzle.

The tube bundle is then ready to be replaced in the shell.

If the above treatment does not produce the desired result communicate with Tate Andale Company.