Bell & Gossett HS 902D Model 62 Vacuum Breaker - Manual

INSTRUCTION MANUAL
HS-902
REVISION D
Hoffman Specialty ®
Model 62
Vacuum Breaker
• Before using this product read and understand instructions.
• Save these instructions for future reference.
• Turn off steam or water before servicing.
• To prevent serious burns, wear heat resistant gloves when handling hot equipment.
Failure to follow this caution could result in property damage or personal injury.
!
CAUTION
OPERATION
As system pressure falls sufficiently below atmospheric pressure to
compress the spring, the vacuum breaker will open, allowing air to
enter the system. The vacuum breaker is factory set to open at
approximately 2 inches Hg vacuum. It is adjustable from 1/4” to 20”
(8 - 508 mm) Hg vacuum.