Air & Vacuum Valves
Air & Vacuum valves are designed to vent large quantities of air when filling pipelines, and to allow air to re-enter pipelines when draining to prevent vacuum collapse.
Features:
- Meets AWWA C-512 standards
- Peripheral guide system for unobstructed closure
- Drip tight closure
Standard Materials:
- Cast iron body with stainless steel trim
- Standard Buna-N seating material
- Optional materials and parts available
Sizes:
- 1/2`` through 24`` available
Combination Air Valves
Combination Air Valves consist of Air and Vacuum Valves and a Pressure Valve mounted in a single body, providing the integrity of a single body casting while permitting each valve of the combination to operate as a separate unit.
Features:
- Single unit integrity when both Air & Vacuum and Pressure Valves are required at one point on a pipeline
- Meets AWWA C-512
Standard Materials:
- Features standard materials offered with Air and Vacuum and Pressure Valves
Sizes:
- 1/2`` through 24`` available
Dual Air Valves
Dual Air Valves are offered with a Pressure Air Valve piped out of the side of an Air & Vacuum Valve, providing a variety of combinations to meet specific air release requirements.
Features:
- Single pipeline location when both Air & Vacuum and Pressure Valves are required at one point on a pipeline
- Meets AWWA C-512 Standards
Standard Materials:
- Features same standard materials as Air &Vacuum and Pressure Valves
Sizes:
- 1/2`` through 24`` available
Deep Well Valves
Deep Well Air Valves have an adjustable top which controls the velocity of air discharged from the valve. It also helps prevent float chatter, and premature closure of the valve mounted on the discharge side of the pump.
Features:
- Peripheral guide system for unobstructed closure
- Vents air from the pump column at the discharge point ahead of a check or control valve
Standard Materials:
- Cast iron body with stainless steel trim
- Standard Buna-N seating material
- Bronze trim and stainless steel float also available
Sizes:
- 1/2`` through 6`` available
- Additional sizes available with Surge Check option
Foot Valves
Installed on the pump suction, Crispin Foot Valves prevent the pump column from draining upon pump shutdown. Silent during operating and normally closed, the valve has a center-guided disc with a Buna-N seat to provide a drip tight seal.
Features:
- Resilient seat provides positive shut off
- Full flow area
- Rugged construction for long life
Standard Materials:
- Cast iron body
- Bronze disc and seat ring
- Stainless steel spring and inlet screen
- Buna-N resilient seat
Sizes:
- 2`` through 36`` available
Midget Air Release Valves
Midget Air Valves are used on hot and cold water systems, including irrigation systems where the venting of small accumulations of air is required while the system is in service and under pressure.
Features:
- Vents trapped air in hot water systems
- Vents air from cold water, petroleum products, and many other liquids with varying specific gravities
- Ideal for automatic priming of Vacuum
- Meets AWWA C-512
Standard Materials:
- Cast iron body
- Stainless steel trim
Sizes:
- Sizes 3/8`` through 1`` available
Negative Pressure Valves
Negative Pressure Air Valves are applied where the interest is only in venting air to the atmosphere, and not permitting air to re-enter the system under vacuum.
Features:
- Vents Air to the atmosphere
- Peripherally guided floats
- Meets AWWA C-512
Standard Materials:
- Cast iron body
- Stainless steel trim
Sizes:
- Sizes 1/2`` through 4`` available
Pressure Air Release Valves
Pressure Air Release Valves are used for the venting of accumulating air while the system is in service and pressurized.
Features:
- Compound lever system
- Adjustable Buna-N rubber plunger
- Meets AWWA C-512
Standard Materials:
- Cast iron body with stainless steel trim
- Cast iron body with s/s & bronze trim, stainless float available for sizes over 2``
Sizes:
- Sizes 1`` through 2`` with stainless steel trim
- Sizes 2 1/2`` through 6`` with bronze/stainless trim
AR SERIES (LOW VOLUME) VALVES
Pressure Air Release Valves
The Crispin Low Capacity Pressure Air Release Valve continuously and automatically vents accumulations of air under pressure.
Features:
- Compound lever system
- Meets AWWA C-512
Standard Materials:
- Cast iron body
- Stainless steel trim
Sizes:
- Sizes 1/2`` through 1`` available
Universal Air Release Valves
Crispin Universal Air Release Valves perform the function of both Air & Vacuum and Pressure Air Valves, permitting the application of various pressure orifice sizes for a range of air volume requirements under varying pressures. The design saves space and reduces cost.
Features:
- Compound lever system
- NPT screwed or ANSI class flanges
- Meets AWWA C-512
Standard Materials:
- Cast iron body
- Stainless steel trim
Sizes:
- 1`` through 8`` available
Vacuum Relief Valves
The Crispin Vacuum Relief allows air to enter the system when a negative pressure occurs, but prevents air from being released under positive conditions, except through an optional small orifice Air Release Valve.
Features:
- Cracks open to admit air at .25 PSIG differential pressure
- Resilient drip tight seat
- ANSI Class 125 & Class 250 flanged connection
Standard Materials:
- Cast iron body
- Bronze and stainless steel trim
- Optional materials available
Sizes:
- Sizes 3`` through 36``
