Crosby Valve

HomeCrosby Valve

Crosby Valve, Safety Valve and Thermal Relief Valve

Crosby Valve LLC is a part of American multinational company called Emerson Electric Company, which focuses on offering engineering services and solutions for automation, home and commercial solutions, and industrial technologies.

For more than 150 years, Crosby valve has been the industry leader in overpressure prevention. In the world, petrochemical and chemical processing, nuclear and conventional power, and the production and refining of oil and gas all make extensive use of direct spring-operated safety and pressure relief valves. The most comprehensive and powerful flow facilities in the business for testing in air, steam, and water is maintained by Crosby valve.

Crosby Valve

The purpose of Crosby thermal relief valve is to release excess pressure in order to safeguard equipment downstream or regulate the pressure of gas or liquid upstream. Both local and international rules and requirements are met by Crosby valve designs Performance information is gathered via thermal relief valve monitoring.

Advantages of Using Crosby Valve

  • 20% more back pressure handling increases back pressure surge reliability.
  • 15% more Kb factor allows sizing of smaller and/or fewer valves.
  • 100 times more resilient than metal bellows for high-frequency cycling.
  • Same springs as JOS valves lowers inventory and spare part costs.
  •  Independently witnessed and cycle, burst, and fire tested by Lloyd’s Register.
  • Simple conversion of current Crosby J-Series using upgrade kits for balanced diaphragm.

The application range of spring-loaded PRVs is increased by the Crosby Balanced Diaphragm, which raises the Kb factor to 15% and extends back pressure limitations to 80% of set pressure. When it comes to applications involving high back pressure and quick pressure cycling, diaphragms are naturally more robust than bellows. Balanced Diaphragm technique enhances safety, reliability, and reduces maintenance costs.

Petroleum and gas production and refining, petrochemical and chemical processing, and nuclear and conventional power all use direct spring-operated Crosby safety and pressure-relief valves.

Crosby Thermal Relief Valve

Crosby is a well-known manufacturer of pressure relief equipment, such as Crosby thermal relief valve, and Crosby safety valve. In a range of situations where thermal expansion endangers the integrity of equipment, Crosby thermal relief valves are engineered and produced to satisfy industry requirements and guarantee dependable performance.

Crosby Thermal Relief Valve

A form of pressure relief valve called a Crosby thermal relief valve is intended to prevent overpressurization in systems, pipelines, and pressure vessels as a result of thermal expansion. A fluid’s internal temperature can rise in a closed system and cause a commensurate rise in pressure. This pressure can lead to catastrophic accidents or equipment breakdown if it exceeds safe limits.

By automatically releasing excess pressure brought on by thermal expansion, thermal relief valve work. Generally, they are made up of a spring-loaded valve mechanism that, although in normal operation, stays closed, opens when the pressure reaches a predefined setpoint. This keeps the equipment safe by enabling the excess pressure to be securely evacuated to the atmosphere or a lower-pressure system.

Crosby Safety Valve

In the business, Crosby Safety Valve is highly regarded for their dependability and quality. By releasing excess pressure when it surpasses a set point, these pressure relief valves shield equipment against overpressure situations. 

The purpose of Crosby safety valve is to release system pressure when it exceeds safe operating limits. This lessens the chance of equipment failures that might be catastrophic, including pipelines, boilers, pressure vessels, and other industrial processes.  Usually, they have a spring-loaded mechanism built in to maintain the valve closed during regular operation. The valve opens to release excess pressure when the pressure is above the set point, safeguarding the apparatus.

Crosby safety valves are known for their dependability and performance, since they frequently comply with numerous industrial standards and requirements. The American Society of Mechanical Engineers (ASME), the American Petroleum Institute (API), and the International Organization for Standardization (ISO) are a few examples of these standards.

To ensure lifespan and resistance to severe operating circumstances, premium materials are used in the construction of these Crosby safety valves. They are usually manufactured in materials including stainless steel, carbon steel, and other alloys that are appropriate for particular uses.

Crosby Safety valve must undergo routine testing and maintenance in order to guarantee proper operation when required. Crosby offers instructions and assistance for appropriate maintenance practices to guarantee peak performance.


The Crosby valve is dedicated to guaranteeing the dependability and safety of its goods by means of stringent testing, quality assurance, and adherence to industry guidelines and standards. Serving clients all over the world, Crosby Valve maintains a global footprint through its network of production sites, warehouses, and sales offices.