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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

B3540-41700BB1W N/A 17" 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
B3540-41700BN1W N/A 17" 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
B3540-41700BN2W N/A 17" 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
B3540-41700BN3W N/A 17" 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
B3540-41700BN4W N/A 17" 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
B3540-41800BA1W N/A 18" N/A 1/2"-20 N/A Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-41800BB1W N/A 18" 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
B3540-41800BN1W N/A 18" 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
B3540-41800BN2W N/A 18" 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
B3540-41800BN3W N/A 18" 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
B3540-41800BN4W N/A 18" 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
B3540-41900BA1W N/A 19" N/A 1/2"-20 N/A Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-41900BB1W N/A 19" 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
B3540-41900BN1W N/A 19" 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
B3540-41900BN2W N/A 19" 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
B3540-41900BN3W N/A 19" 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
B3540-41900BN4W N/A 19" 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
B3540-42000BA1W N/A 20" N/A 1/2"-20 N/A Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-42000BB1W N/A 20" 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
B3540-42000BN1W N/A 20" 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
B3540-42000BN2W N/A 20" 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
B3540-42000BN3W N/A 20" 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
B3540-42000BN4W N/A 20" 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
B3540-42100BA1W N/A 21" N/A 1/2"-20 N/A Shut-Off N/A 175 PSI N/A 225° F N/A Buna-N N/A Aluminum
B3540-42100BB1W N/A 21" 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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