Pressure Relief Valve; Rupture Disk; Propane Cylinder Capacity - Landa VHP Series Operator's Manual

Pressure Relief Valve

Each machine is equipped with a relief valve to relieve
pressure in the system when higher than normal
operating pressures are encountered. Unusually high
pressures come from an object plugging the spray
nozzle. This problem can easily be remedied by
removing the obstruction. If operating pressure of
machine is found to be normal and relief valve
continues to leak, repair or replace the valve.

Rupture Disk

If pressure from pump or thermal expansion should
exceed safe limits, the rupture disk will burst, allowing
high pressure to be discharged through hose to ground.
When disk ruptures, it needs to be replaced.
Landa VHP 2-1500 / 3-2000 Operator's Manual 8.913-949.0 - T

Propane Cylinder Capacity

An important consideration with propane systems is the
capacity of the supply cylinder relative to the needs of
the burner. The burner operates on propane as a gas;
as gas is used from the propane cylinder, the liquid in
the cylinder boils to maintain gas pressure. This boiling
process cools the liquid, and in a heavy, continuous-
demand situation, the liquid temperature can fall to the
point at which it cannot provide gas as rapidly as is
needed. In this case, it may be necessary to warm the
propane cylinder by directing a warm spray, not over
120° F, on the cold cylinder or by manifolding two
propane bottles together to increase total vaporization
capacity. It is recommended that a minimum 30 lb.
vapor propane bottle be used on the machine.
Maintenance
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