Install Instructions

Brazed Plate Heat Exchangers Installation, Operation, and Maintenance Manual 7

4. Provide air vent valves for the heat exchanger so that it can be purged to prevent or relieve vapor

or gas binding.

5. Install proper relief valves and temperature alarms to insure the heat exchanger isn’t subject to

conditions beyond the intended design.

6. Don not weld or braze brackets or attachments directly to body of heat exchanger.

7. For soldering type connections braze with minimum 45% silver solder and at a maximum 1200° F.

For welded type connections use TIG or MIG welding. Avoid overheating. A wet cloth or rag

should be placed around the base of the connection. A nitrogen purge should be used to avoid

internal oxidation. Braze or weld with exchanger in the vertical position.

8. The nozzle connections are designed for normal torque force and damage may occur if over

tightened. The use of pipe sealant materials compatible with the system fluids is recommended for

threaded type connections. Connection load limits should be observed and are shown in Figure 2,

Table 2, and Table 3.

FIGURE 2

435 psig Standard Design

150 psig Pressure Design

Model T (lbs) F (lbs) Mb (in-lbs) Mv (in-lbs)

400, 405 2836 1150 328 636

410, 411, 412 4589 1375 540 1416

415 4589 1375 540 1416

422, 423, 424 6247 2300 2600 4373

432, 433, 434,

435

Consult Factory Consult Factory

Model T (lbs) F (lbs) Mb (in-lbs) Mv (in-lbs)

400 200 100 20 200

410, 411,

412

280 130 27 300

TABLE 2

TABLE 3