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91
Vents
Model 792 Part No. 401494
High Pressure Water Vent Valve
• For releasing air from hot or cold water or glycol mains,
hydronic heating and chilling systems, storage and
processing tank filters, centrifugal pumps with specific
gravity greater than 0.7
• Cast iron body and cover, stainless steel interior
• Maximum operating pressure 250 psig (17.3 bar)*
• Maximum hydrostatic pressure 350 psig (24.2 bar)
• Maximum
temperature 300°F (149°C)
4
1
/16"
(103.2mm)
1
/2" NPT
3
/4" NPT
7"
(178mm)
1
/2" NPT
1
/4" NPT
High Pressure
Water Vent Valve
Model 792
Model 792 Capacity
Water Pressure Air Discharge to Atmosphere
psig (bar) cu. ft./min. (cu. m/min.)
100 (6.9) 10 (.28)
150 (10.3) 15 (.42)
200 (13.8) 20 (.57)
250 (17.3) 25 (.70)
Model 790 Part No. 401479
Water Vent Valve
• For removing air from convectors, baseboard
and wall radiation
• Safety drain connection for discharging moisture
• Fitting and ferrule for
3
⁄16" (4.8mm) OD tubing
• Telescopic siphon tube
•
1
⁄8" NPT straight shank
• Maximum operating pressure 30 psig (2.1 bar)*
• Maximum pressure 30 psig (2.1 bar)
Model 791 Part No. 401482
Water Vent Valve
• For convectors and small
mains
• Safety drain connection for discharging moisture
• Fitting and ferrule for
3
⁄16" (4.8mm) OD tubing
• Telescopic siphon tube
•
1
⁄4" NPT straight shank
• Maximum operating pressure 50 psig (3.5 bar)*
• Maximum pressure 50 psig (3.5 bar)
4
1
/4"
(108mm)
1
1
/2"
(38mm)
4
7
/8
"
(124mm)
1
1
/2
"
(38mm)
Water Vent Valve
Model 790
Water Vent Valve
Model 791
*Maximum pressure against which the vent can open.
Hoffman Specialty
®
Vents