RM Technologies of America

Ammonia Specialties Group

Phone: 800-775-4280

​Email: sales@rmtech.net

Ammonia Valves & Assemblies

Safety Relief Valves

  • They relieve pressures, liquid or vapor, that exceed the design pressure of a tank or piping system.
  • They have a finite life span due to the rubber seat; expiration noted on valve.
  • They are fitted with plastic caps to prevent contamination and as an indication that a valve has opened.
  • They are mounted on a three-way valve manifold allowing one valve to be open and the other isolated.


  • They are installed on a piping system wherever liquid can get trapped in the line to release the liquid and prevent a hydrostatic eruption.
  • If a hydrostat leaks, a second hydrostat can be threaded into the first one making it unnecessary to drain the line for replacement.

Tank Filling Valves

  • They are the valves the vapor and liquid hoses are connected to when filling a storage tank.
  • They are fitted with protective caps to prevent contamination and to identify ammonia liquid and vapor connections.  The liquid cap is orange and the vapor cap is yellow.  
  • Vapor Connection: Controls the delivery pressure differentials by transferring vapor from one tank to another.
  • Liquid Connection:  Controls liquid withdrawal.
  • A vent valve should be installed between the fill valve and the protective cap to relieve pressure before protective cap is removed.

Vent Valves

  • They are installed to relieve pressure before a valve is opened.  

Excess Flow Valves

  • They are connected to all piping and hose connections to prevent a massive release in the event of a catastrophic line break; NH3 only.

Pressure Gauges

  • They measure the pressure inside a tank, usually a range of 0 - 400 psi. 

85% Outage Gauge

  • They indicate when a tank reaches the 85% liquid level.  Trace vapors are released when liquid level is below 85%; A puff of white smoke is released when liquid level is at or above 85%.

Liquid Level Gauge

  • Liquid level gauge reads the percent (%) of total tank capacity.  Capacity of tank (gallons) times the percent reading equals gallons.


  • They measure the liquid level of a tank.  You take the average of clockwise and counterclockwise readings.
  • ​When the dip tube reaches below the liquid level a puff of white smoke appears.

Pressure Transmitter

  • It transmits the pressure readings to the PLC to display on the screen for operators.

Level Transmitter

  • It transmits the level readings to the PLC to display on screen for operators.

Temperature Transmitter

  • It transmits the temperature readings to the PLC to display on screen for operators.