Metal seated ball valves VS metal seated butterfly valves



For heating pipeline with high temperature steam, we generally choose metal seated ball valves and metal seated butterfly valves. Now we will make a comparison of their performance.

 


Metal seated ball valves

Metal seated butterfly valvest

Sealing performance

Bidirectional zero leakage

Bidirectional ANSI V Class

Liquidity

Full bore , large flow

In the open state of the butterfly valve, the valve plate   and valve shaft occupy a part of the flow channel . The smaller the   diameter, the more they occupy the flow channel

Operating torque

With the increase in ball diameter of seal face contact   area times the square will also increase large

Torque than the small

Operating temperature

Metal to metal configuration for high temperature

Butterfly valve can be used in conventional saturated steam   medium for heating ( below 350 degrees)

Service life

Longer life

Metal-to-metal seal structure for long life

cost

The process is complicated and the cost is high

Small size , light weight and low cost

 

 

To sum up, in the general pipe network of central heating, the cost performance of ball valves below DN300 is better, and the cost performance of butterfly valves above DN300 is better . This is also the choice of many years of experience for most designs and users