Habonim Catalog Interactive 2024 V04 15022024 - Catalog - Page 412
M
Ammonia Service Ball Valves (M)
Habonim's ammonia service ball valves are suited to provide optimal protection and functionality
for use in severe ammonia service applications. valves designated for ammonia service are
specially prepared and cleaned to meet requirements for the safe operation of ammonia service
equipment and media purity.
Ammonia
Ammonia is a compound of nitrogen and hydrogen with the formula NH, at atmospheric
conditions, ammonia is a colorless gas lighter than air with a pungent, suffocating odor. It
is a highly caustic irritant that is both toxic and flammable. Ammonia is soluble in water to
provide an alkaline solution.
Ammonia is lighter than air, its density 0.73 kg/m3 (1.013bar at 15°C).
• Ammonia boiling point is -33°C (-28°F) at a pressure of 1 atmosphere, a liquid ammonia
needs to be stored under high pressure or at low temperature.
• Ammonia melting point is -78°C (-108°F).
Ammonia Uses
Manufactured by synthesis from nitrogen and hydrogen, ammonia has many uses in the
production of fertilizers, plastics, explosives, pharmaceuticals, metal treating operations,
refrigerant, cleaning agent and more. Ammonia is developing to be a major renewable fuel
as a carrier of Hydrogen.
Self-Relieving-Seat
(SRS)
Ammonia Hazards
Ammonia combined with oil, grease or other combustible substances can result in explosions.
valves to be used in ammonia systems should be selected properly.
General
Ammonia Service feature is available for part of Habonim’s valves series – check series ordering
codes for availability. Available valve sizes, types and variety of end connections are per each
relevant series ordering codes.
Design
Valves designed for ammonia in a liquid state should be equipped with an upstream pressure
relief hole in the ball (Ordering code -P250).
The relief hole avoids trapped cavities in the valve closed position and pressure buildup due
to thermal expansion during liquid ammonia boil off. A valve with relief hole in the ball is unidirectional, the relief hole must be positioned at the upstream flow direction for complete
in-line sealing.
For Bi-directional valve design for liquid ammonia a Self-Relief Seats (Ordering code -SRS)
should be used with seats material of TFM or CF PTFE, the SRS seat design dynamically release
cavity pressure buildup and return to shutoff position once the over pressure is relieved. Valves
designed for ammonia in the gaseous state do not require an upstream pressure relief hole.
412
SPECIAL USE VALVES
Cavity pressure relief
(P250 Ball)
3 mm relief hole face
the upstream
