Elevator shut off valves

We recently had Maxton valve complete training for our mechanics and they brought a new product they are selling.  They introduced to us their new elevator hydraulic line shut off valve.

As many elevator personnel know you find all sorts of shut off valves in the elevator line.  Over the years there have been issues with certain brands and types of shut off valves in which some States have required the removal of these valves.

The new Maxton shut off valve is a more robust shut off valve compared to what is out there at this point in time.  

• A shut off ball valve built, labeled and tested to comply with ASME A17.1/CSA B44 standards at a 5:1 safety factor (1000 psi max operating pressure)
• A shut off ball valve designed for use in hydraulic elevators specifically
• With interchangeable flange sizing of 2" & 2.5" grooved or threaded 
• A unique locking handle design preventing accidental fluid loss 
• Hard chrome plated carbon steel (2" Full Port) ball with blow out proof stem used across the line

WSP – Working Steam Pressure - A pressure rating specific to the media steam and expressed in P.S.I. 

WOG – Water Oil Gas - indicating maximum P.S.I. for the medias Water, Oil or Gaseous

Some of the older valves may not meet the requirements in the 17.1-2013 3.19.1.3[8.2.85].  

Note in code -  “Valves and fittings rated for a different system may be used in hydraulic elevator systems when substantiated in accordance with the elevator code.” 

[an old shut off valve I ran into in the City of Chicago]

At the end of the day we as elevator sales people, managers, technicians, inspectors and consultants need to be aware of what should be installed and what is not correct.  There are a lot of different shut off valves out there some which may need to be removed and some which can stay but there needs to be research and some calculations completed as there are two different rating systems for some of these valves[see below].

[This shut off valve has both WSP & WOG ratings indicated on it]

We are currently looking into the wording in the code to see what our ratings for old and new ball valves should be and will report on that at a later date. 

If you have any questions or would like information from Colley Elevator you can go to www.colleyelevator.com, email Craigz@colleyelevator.com or call 630-766-7230.