Valve arrangement

Details Valve arrangement Valve arrangement

1986-08-05

1988-03-01

Nilson, Robert G.

Fluid handling

Removable valve head and seat unit

Threaded into valve casing

137536, 137540, 251368, F16K 1706

Patent

active

047279028

ABSTRACT:
A pressure relief valve for a hot gas generator is constructed as a valve arrangement which can be subjected to high temperature shocks and abrasion causing gaseous streams. The valve arrangement is constructed so as to have a prolonged operative life despite such operative demands, whereby simultaneously the predetermined pressure resistance for this valve arrangement is precisely maintained. For this purpose the valve arrangement includes a piston of substantially longitudinal cylindrical shape which has hemispherically shaped ends. A coil spring is operatively maintained behind the piston between a pair of end pieces which bias the piston towards a combustion chamber. The valve arrangement includes a valve body in which the piston is slidably moved. The valve body is made of a high temperature molybdenum alloy, whereas the piston, the seat and the end pieces for the coil spring 16 are made of a material having poor heat conduction characteristics, preferably silicon nitride.

REFERENCES:
patent: 1020641 (1912-03-01), Dronsfield
patent: 3105517 (1963-10-01), Alfieri
patent: 4531542 (1985-07-01), Looney

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