Our zone valve line is now unique in the marketplace, the most flexible, able to be tailored to any control input and to all Cvs (Kvs) and characterizing shapes. Suits all piping requirements and meets the high pressure......Our zone valve line is now unique in the marketplace, the most flexible, able to be tailored to any control input and to all Cvs (Kvs) and characterizing shapes. Suits all piping requirements and meets the high pressure requirements of buildings up to 40 and 50 stories high (ANSI 250 400 psig @ 150º). Each valve is fully serviceable from the top, interchangeable inserts allowing for Cv change at will, as well as complete service/rebuild, in line. All of our valve bodies are now low zinc bronze for decades of service and now more competitive than ever ... a truly remarkable line! Good ideas abound with our V411 and V431 system valves too! Again, low zinc, many Cvs, temp/press sensing ports, unique variable-ratio assisted equal percentage characteristics, multiple actuators, a total of 50 good reasons for using Spartan products. ... a tough and durable "valve for all reasons". A few points to remember... Compact, globe-type zone valves, fail safe or fail in last position, two position or modulating. Two, three or even four ported versions... 1/2" through 2" screwed and 2-1/2 " through 10" flanged globe control valves, two-way or three-way, available with pneumatic, electric or electronic actuators. Intriguing thermostats, differential pressure regulators and actuators compliment the line. Prompt assistance, good deliveries and how-to-do-it reports back up the service.