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ANHYDROUS AMMONIA SUPPLIES
239
RELIEF VALVES
RELIEF VALVE ADAPTER
Relief valve adapters are used when the NH3 hose assembly remains
on the toolbar instead of the nurse tank. Install the adapter between
the NH3 quick coupler and the NH3 hose assembly. Install a ¼ inch
hydrostatic relief valve (A400 or A1325) into
the relief valve adapter to provide vapor relief to
the NH3 hose assembly in excessive pressure sit-
uations.
1 in. MNPT x 1 in. FNPT
Part No. A2031
1-¼ in. MNPT x 1-¼ in. FNPT
Part No. A2032
VAPOR RELIEF VALVES
Vapor relief valves are safety valves
designed to open when tank pres-
sure rises above 250 PSI. Used on
applicator, storage, and nurse
tanks, they will protect tanks, pip-
ing or hose from excessive pressure
caused by overfilling or fire. Relief
valves should be replaced 5 years
after the date of manufacture
which is stamped on the valve.
¾ in. Vapor Relief Valve for Applicator Tanks
Part No. A1301A
1-¼ in. Vapor relief valve for Storage Vessels
Part No. A1310A
BLEEDER VALVE
The bleed valve has a T-handle and is designed
to bleed-off trapped liquid or vapor NH3 in hose
valves, couplings, and piping. Also for installation in
tanks as an 85% liquid level gauge.
¼ in. Bleed Valve Knob
Part No. A1911
¼ in. Bleed Valve Knob with 12 in. dip tube installed
Part No. A1911
Description
Part No.
Manifold only
A1416
Manifold with two A1310A relief valves with a
2" FNPT tank connection
A1416A
Packing Repair Kit
1415-7
A1416
Pipe Nipple Included
RELIEF VALVE MANIFOLD
The A1416 relief valve manifold is used on large NH3 tanks to allow
removal of a relief valve for inspection or replacement, without the
need of evacuating the tank. Adequate relief protection is provided
by the remaining relief valve in the manifold. Bleeder valves relieve
vapor pressure under each relief valve after closing the manifold port,
and each port can be closed separately, meeting code requirements.
HYDROSTATIC RELIEF VALVE
Hydrostatic relief valves are designed to relieve
liquid pressure in valves, hoses, or piping wherein
liquid may be trapped. Pressure set at 375 PSI.
Note:
All safety relief and hydrostatic relief valves
must be changed five years after date of manufac-
ture.
¼ in. Hydrostatic Relief Valve
Part No. A1327