Steel case 

63 (2 ½"), 100 (4") and 150 (6")

For ammonia

Model U26 

Steel case

40 (1 ½"),  50 (2"), 63 (2 ½")  100 (4") 

For compressed gas, welding, cutting and allied processes, EN562 

Model R1 

Steel case

63 (2 ½") and 100 (4")

For compressed gas, welding, cutting and allied processes, EN562  

Model R3

Steel case 

63 (2 ½") and 100 (4")

For compressed gas, welding, cutting and allied processes, EN562  

Model R17

Steel case 

63 (2 ½") and 100 (4") 

For general application

Model U71

Stainless steel case

50 (2"), 63 (2 ½") and 100 (4")  

For compressed gas, welding, cutting and allied processes, EN562 

Model R11