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TABLE OF CONTENTS
1.
Principle of operation
2.
Delivery condition
3.
Installation of safety valves
4.
Operation of safety valves
5.
Adjustment of the set pressure
6.
Maintenance and repair of safety valves
7.
Operating disturbances and their elimination
8.
Warranty
1.
Principle of operation
The purpose of the safety valve is to protect the equipment and installations against excessive pressure above
the pressure limit.
When the force coming from the pressure acting on the disc surmount with the force from the spring, the valve starts
to open. A further increase in the pressure, required for the particular design of the valve, causes its full opening aided
by the bell or lifting ring.
2.
Delivery condition
Supplied valves are tested and set for the required opening pressure or, when ordered for
range, for the upper pressure of the range.
Valves are stamped on the nameplate fixed to the cylindrical part of the body.
Nameplate
USER MANUAL
SPRING-LOADED
SAFETY VALVES
zARMAK
781T (ex. 781)
776 ( ex. 775-I)
Edition: 07/2016
Date: 01.07.2016
Figure 781 Figure 776
ZETKAMA Sp. z o.o
.
ul. 3 Maja 12
PL 57-410 Ścinawka Średnia
