BNZ Cooler Catalog
32Pages

Lovejoy Hydraulics Water-Oil Coolers

Water-Oil Coolers Table of Contents Lovejoy, Inc has made every effort to assure the accuracy of the information contained in this catalog. However, Lovejoy, Inc expressly disclaims any and all liability for the contents of this catalog including, but not limited to, errors, inaccuracies, misstatements, omissions and any incidental or consequential damages which may occur as the result of relying on this information. Lovejoy reserves the right to change specifications and information without notice.

Water-Oil Coolers Overview The BNZ Series of water - oil coolers provide an efficient way to cool hydraulic fluid utilizing shell and tube technology. The design consists of an outer housing shell and a tube / fin bundle known as a “cartridge”, which fits inside the shell. Hydraulic fluid to be cooled is circulated through the housing shell and passes across the cooling fins, which transfers the heat to the cooling tubes in the cartridge. Cooling fluid, being typically water or water-glycol, flows through the cooling tubes that pass through the cartridge, carries the absorbed heat away....

Water-Oil Coolers BNZ Cooler Construction Overview / Technical Data BNZ Cooler Construction Materials ■■Cast iron end caps • Stainless Steel optional ■■Cast iron port housings ■■Steel mounting brackets • May be rotated in 90 degree increments ■■Welded steel shell tube ■■C440 gaskets (compatible with fluids) ■■Steel drain plug Port Options Include ■■NPT ■■SAE O-Ring ■■BSPP ■■SAE Flange Technical Data Oil Ports O-Ring Series Water Coolant Ports SAE Test Port Note: indicates: Unified Thread Standard (UTS) [controlled by ANSI] standard machine thread bolt holes on flanges are available at n 1...

Water-Oil Coolers Overview / Maximum Flow Rates BNZ Cooler Cartridges Hot Oil (In) ■■Tubes with aluminum fins provide extended cooler surface for additional cooler capacity in a compact package Baffle Plate ■■Aluminum fins are mechanically bonded to the tubes using a tube expansion process proprietary to Lovejoy, Inc. ■■Each cartridge has a minimum of 1 baffle plate with longer designs having additional baffle plates to provide flow restriction and routing hot oil through the proper number of cooling passes ■■Copper tubes are standard • Copper Nickel is available Oil Flow Water Flow Maximum...

Water-Oil Coolers Selection Process Steps In Selecting a BNZ Cooler: Note: Performance Curves are based on 100 SSU oil leaving the cooler 40°F higher than the incoming water temperature (40°F approach temperature). Step 1: Determine how much heat that needs to be removed from the system (the Heat Load ). This will vary from system to system, but typically coolers are sized to remove 25 to 50% of the input nameplate horsepower, with 30% being an average number. ( For Example: 100 HP Power Unit x .30 = 30HP Heat load.) If BTU/Hr. is known: HP = BTU/Hr 2545 Step 2: Determine the Approach...

Water-Oil Coolers Oil Viscosity Correction Multipliers Selection Process Desired Reservoir Temperature ■■Return Line Cooling: Desired temperature is the oil temperature leaving the cooler. This will be the same temperature that will be found in the reservoir. ■■Off-Line Recirculation Cooling Loop: Desired temperature is the temperature entering the cooler. In this case, the oil temperature change must be determined so that the actual oil leaving temperature can be found. Calculate the oil temperature change (Oil ∆ T) with this formula: Oil ∆T=(BTU’s/Hr.)/GPM Oil Flow x 210) ■■To calculate...

Water-Oil Coolers 1:1 Oil to Water Ratio BNZ 60-131 to 920, 1 Pass, 1:1 Oil to Water Ratio BNZ 60-131 to 920, 1 Pass, 1:1 Oil to Water Ratio 50 Horsepower Removed Note: n * indicates: Total number of baffle plates. BNZ 80-208 to 920, 1 Pass, 1:1 Oil to Water Ratio BNZ 80-208 to 920, 1 Pass, 1:1 Oil to Water Ratio 120 Horsepower Removed Note: n * indicates: Total number of baffle plates.

Water-Oil Coolers 1:1 Oil to Water Ratio BNZ 125-310 to 920, 1 Pass, 1:1 Oil to Water Ratio BNZ 125-310 to 920, 1 Pass, 1:1 Oil to Water Ratio 500 Horsepower Removed P=20 Note: n * indicates: Total number of baffle plates. BNZ 125-1225, 1 Pass, 1:1 Oil to Water Ratio BNZ 125-1225, 1 Pass, 1:1 Oil to Water Ratio 740 Horsepower Removed Note: n * indicates: Total number of baffle plates.

Water-Oil Coolers 2:1 Oil to Water Ratio BNZ 60-131 to 920, 2 Pass, 2:1 Oil to Water Ratio BNZ 60-131 to 920, 2 Pass, 2:1 Oil to Water Ratio Horsepower Removed Note: n * indicates: Total number of baffle plates. BNZ 80-208 to 920, 2 Pass, 2:1 Oil to Water Ratio BNZ 80-208 to 920, 2 Pass, 2:1 Oil to Water Ratio 80 Horsepower Removed P=20 Note: n * indicates: Total number of baffle plates.

Water-Oil Coolers 2:1 Oil to Water Ratio BNZ 125-310 to 920, 2 Pass, 2:1 Oil to Water Ratio BNZ 125-310 to 920, 2 Pass, 2:1 Oil to Water Ratio 7 Horsepower Removed Note: n * indicates: Total number of baffle plates. BNZ 125-1225, 2 Pass, 2:1 Oil to Water Ratio BNZ 125-1225, 2 Pass, 2:1 Oil to Water Ratio Note: n * indicates: Total number of baffle plates.

Water-Oil Coolers 4:1 Oil to Water Ratio BNZ 60-208 to 463, 2 Pass, 4:1 Oil to Water Ratio BNZ 60-208 to 463, 2 Pass, 4:1 Oil to Water Ratio 20 Horsepower Removed Note: n * indicates: Total number of baffle plates. BNZ 80-208 to 920, 2 Pass, 4:1 Oil to Water Ratio BNZ 80-208 to 920, 2 Pass, 4:1 Oil to Water Ratio 80 Horsepower Removed P=20 Note: n * indicates: Total number of baffle plates.

Water-Oil Coolers 4:1 Oil to Water Ratio BNZ 80-208 to 920, 4 Pass, 4:1 Oil to Water Ratio BNZ 80-208 to 920, 4 Pass, 4:1 Oil to Water Ratio 50 Horsepower Removed Note: n * indicates: Total number of baffle plates. BNZ 125-310 to 615, 2 Pass, 4:1 Oil to Water Ratio BNZ 125-310 to 615, 2 Pass, 4:1 Oil to Water Ratio 20 Horsepower Removed P=20 50 Note: n * indicates: Total number of baffle plates.

Water-Oil Coolers 4:1 Oil to Water Ratio BNZ 125-920 to 1225, 2 Pass, 4:1 Oil to Water Ratio BNZ 125-920 to 1225, 2 Pass, 4:1 Oil to Water Ratio Horsepower Removed P=20 Note: n * indicates: Total number of baffle plates.