Emerson SAPAG 7700 Installation, Maintenance And Adjustment Instruction

SAPAG
Attention
The safety of lives and property often
depends on the proper operation of the
pressure relief valves. Consequently, the
valves should be kept clean and should be
periodically tested and reconditioned to
make sure they function properly.
WARNING
Suitability of the material and product for
the use contemplated by the buyer is the
sole responsibility of the buyer. Also storage,
installation and proper use and application are
the sole responsibility of the purchaser. Emerson
Valves & Controls disclaims any and all liability
arising out of same.
Any installation, maintenance, adjustment,
repair and testing performed on pressure relief
valves should be done in accordance with
the requirements of all applicable Codes and
Standards under which those performing such
work should maintain proper authorization
through appropriate governing authorities.
No repair, assembly and test work done by
other than Emerson Valves & Controls shall
be covered by the warranty extended by
Emerson to its customers. You assume full
responsibility for your work. In maintaining
and repairing Sapag products you should use
only parts manufactured by Emerson Valves &
Controls. Call your nearest Emerson regional
sales office or representative for a Sapag
service engineer should you wish assistance
with your field needs.
www.valves.emerson.com
Sapag Type 7700 pressure relief valves
Installation, Maintenance and Adjustment Instruction
General
Sapag valves have been tested and adjusted at the factory. As service conditions differ it may be
necessary to make slight adjustments. These adjustments are easily made if the instructions below
are carefully followed.
Warning
To have trouble free performance be sure to thoroughly clean the inlets and outlets of
valves before installing.
Storage and handling
Valves are often on hand at the job site months before they are installed. Unless properly stored
and protected, valve performance may be adversely affected. Rough handling and dirt may damage
or cause misalignment of the valve parts. It is recommended that the valves be left in their original
shipping containers and that they be stored in a warehouse or as a minimum on a dry surface with
a protective covering until they are used.
Pressure relieving valves must be handled carefully and never subjected to sharp impact loads.
They should not be struck, bumped or dropped. Rough handling may alter the pressure setting,
deform valve parts and adversely affect seat tightness and valve performance.
Note
Where the valve has a lever as in type F top construction, do not lift or carry valves by
the lever!
Inlet and outlet protectors should remain in place until the valve is ready to be installed on the
system.
Installation
• Inlet piping
The valve should be mounted vertically in an upright position either directly on a nozzle from the
pressure vessel or on a short connection fitting that provides a direct, unobstructed flow between
the vessel and the valve. Installing a pressure relief valve in other than this recommended position
might adversely affect its operation.
A valve should never be installed on a fitting having a smaller inside diameter than the inlet
connection of the valve.
Compliance with the above recommendations will assure clean positive valve operation.
Many valves are damaged when first placed in service because of failure to clean the connections
properly when installed.
Both the valve inlet and the vessel and/or line on which the valve is mounted must be thoroughly
cleaned of all dirt and foreign material.
• Outlet piping
Discharge piping should be simple and direct. A broken connection near the valve outlet is
preferred. The weight of the discharge piping should be carried by a separate support and be firmly
braced against swaying or vibrations.
Fittings or pipe having a smaller inside diameter than the valve outlet connections must not be
used. The flow from the valve must discharge to a safe disposal area.
The safety of lives and property often depends on the proper operation of the
pressure relief valves. The valves must be maintained according to appropriate
instructions and must be periodically tested and reconditioned to ensure that they
function correctly.
Sapag pressure relief valves described in this instruction are manufactured in accordance with the
requirements of ASME Boiler and Pressure Vessel Code, Section VIII.
Emerson reserves the right to change the contents without notice
Eng doc: IS V 3117
SAPSB-0012-EN-1309