High Pressure Valve

In September 2013 Kelso’s new JS330 external pressure relief valve for pressurized tank cars was successfully tested and confirmed by an independent, AAR-approved engineering test facility in Nunn, Colorado as required by the railway industry.  The JS330 is a derivative of our existing pressure relief valve patent and is designed for the transport of pressurized commodities such as liquid propane gas and anhydrous ammonia.  The JS330 will be offered, and can be adjusted to operate, in 225PSI, 247PSI, 280PSI and 330PSI start to discharge pressures.  It is suitable for applications in both the new tank car and retrofit/repair markets.  Kelso will apply to the AAR for an application number and service trial approval that we anticipate will commence in 2016 and be completed within two years.  A patent application is also in progress.

Dual-Rated PRV

On February 20, 2014 Kelso announced that it had filed a patent application for its new dual-rated pressure relief valve (DPRV) design based on existing patents that cover our external constant-force spring PRV.  The DPRV was developed in response to an industry-wide request by the Association of American Railroads and the Railway Supply Institute for higher performance standards for pressure relief valves used on rail tank cars carrying crude oil, ethanol and other packing group I and II commodities or those requiring higher start to discharge pressures.  This is a key part of ongoing regulatory efforts by the United States and Canada to provide safer rail tank cars.  In general terms, in a rail tank car accident involving fire, our DPRV will significantly lower its operating pressure rating based on temperature only to a level that will keep the valve open in order to evacuate the contents of a tank car in less than 100 minutes as specified by AAR recommendations.  Our DPRV fits seamlessly to existing tank car designs and can be retrofitted in the field to minimize costs.  

For more information on ordering any of the above products in development, please contact a Kelso sales representative.