Rethinking Evaporator Hot Gas Defrost Times

Hot gas defrost is one of those processes in an ammonia refrigeration system that can easily become a “set it and forget it” operation. An evaporator may have been programmed for a 30-minute hot gas defrost years ago, and as long as the coil stays clear, nobody questions it. But just because a defrost cycle works does not necessarily mean it is operating efficiently. The challenge with that mindset is that a defrost cycle can be effective without necessarily being efficient.

MySafety LLC

Jul 296 min read

Smarter SOPs for Ammonia Systems

In ammonia refrigeration, documentation is not just paperwork. It is how operators understand the system, improve efficiency, maintain consistent performance, reduce miscommunication, and comply with industry regulations. That is why SOPs and P&IDs need to be accurate, current, and actively used within your PSM program or General Duty facility. These documents shouldn't just sit in a binder or folder for audits. They should guide training, daily operation, maintenance activit

MySafety LLC

Jul 34 min read

Learn the functions of oil in ammonia screw compressors.

Oil: More Than Just Lubrication

When asked what the oil in an ammonia screw compressor is responsible for, most people immediately answer, "lubrication." While that's certainly true, lubrication is only one of several critical functions oil performs within the compressor. This oil lubricates bearings and moving components, absorbs heat generated during compression, and creates a dynamic seal between the rotors and compressor housing. This sealing effect reduces internal leakage, improves volumetric efficien

MySafety LLC

Jun 163 min read

High Liquid Level Cutout Testing

Learn about the IIAR requirements for testing high liquid level cutouts on ammonia refrigeration systems.

MySafety LLC

Mar 314 min read

Who Can Calibrate Ammonia Detectors?

Whether you’re new to ammonia refrigeration or a seasoned professional, you’ve probably heard someone talk about calibrating ammonia detection equipment, a critical safety system in place to protect people, property, and the environment from an ammonia release. Calibrating ammonia detection equipment is a mechanical integrity activity that ensures the equipment is properly maintained, operated, and functioning as intended. Many facilities opt to outsource this activity to a m

MySafety LLC

Feb 44 min read

IIAR 9 System Applicability

Our team has spent a lot of time working with our clients to help them navigate the applicability of best practices. In the field of ammonia refrigeration, the International Institute of All-Natural Refrigeration (IIAR) is known as our leading best practice, or what our industry refers to as "Recognized and Generally Accepted Good Engineering Practices" (RAGAGEP). This doesn't mean IIAR is the only option out there for ammonia refrigeration systems, but it is considered to be

MySafety LLC

Jan 214 min read

What Really Happens During an Ammonia Release?

Understanding how ammonia behaves when it is accidentally released is extremely important for protecting people, facilities, and the environment. When stored under pressure, ammonia can rapidly turn into a mixture of gas and cold liquid droplets known as a two-phase release, that creates visibility hazards, breathing risks, and unpredictable movement through indoor spaces. The following information is a simplified technical summary of the 186-page Jack Rabbit III laboratory s

MySafety LLC

Dec 6, 20256 min read