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The length between the center of the two bolts is referred to as the center line.  The distance between the center of the tank holes must be within 1/32” of the center line measurement.
B3540-4 Category Image
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Item #

Centerline

Mounting

Feature

Max Pressure

Max Temperature

Seals

Body Material

B3540-42900BB1W N/A 29" N/A 1/2"-20 with Nuts N/A Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-42900BN1W N/A 29" N/A 1/4" Male NPT Adapters N/A Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-42900BN2W N/A 29" N/A 3/8" Male NPT Adapters N/A Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-42900BN3W N/A 29" N/A 1/2" Male NPT Adapters N/A Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-42900BN4W N/A 29" N/A 3/4" Male NPT Adapters N/A Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-43000BA1W N/A 30" N/A 1/2"-20 N/A Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-43000BB1W N/A 30" N/A 1/2"-20 with Nuts N/A Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-43000BN1W N/A 30" N/A 1/4" Male NPT Adapters N/A Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-43000BN2W N/A 30" N/A 3/8" Male NPT Adapters N/A Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-43000BN3W N/A 30" N/A 1/2" Male NPT Adapters N/A Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-43000BN4W N/A 30" N/A 3/4" Male NPT Adapters N/A Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-43100BA1W N/A 31" N/A 1/2"-20 N/A Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-43100BB1W N/A 31" N/A 1/2"-20 with Nuts N/A Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-43100BN1W N/A 31" N/A 1/4" Male NPT Adapters N/A Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-43100BN2W N/A 31" N/A 3/8" Male NPT Adapters N/A Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-43100BN3W N/A 31" N/A 1/2" Male NPT Adapters N/A Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-43100BN4W N/A 31" N/A 3/4" Male NPT Adapters N/A Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-43200BA1W N/A 32" N/A 1/2"-20 N/A Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-43200BB1W N/A 32" N/A 1/2"-20 with Nuts N/A Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-43200BN1W N/A 32" N/A 1/4" Male NPT Adapters N/A Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-43200BN2W N/A 32" N/A 3/8" Male NPT Adapters N/A Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-43200BN3W N/A 32" N/A 1/2" Male NPT Adapters N/A Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-43200BN4W N/A 32" N/A 3/4" Male NPT Adapters N/A Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-43300BA1W N/A 33" N/A 1/2"-20 N/A Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-43300BB1W N/A 33" N/A 1/2"-20 with Nuts N/A Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
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