all kinds of butterfly valve contrast the difference between abstract:

1, worm gear butterfly valve, and what is the difference between manual butterfly valve?

worm here can be very light open and close the valve, more effort, and reliable shut up and reach the designated position, the manual, it is relatively arduous opened and closed, but the manual action soon. Switch quickly. General large diameter with worm gear.

2, what's the difference between the wafer handle butterfly valve and worm gear, respectively, in what place?

the wafer handle butterfly valve and worm gear transmission is the main difference between the way different, mainly according to the size of these two kinds of valves and open-close moment of decision.

handle butterfly valve with small diameter, usually because of the small torque is small, can open and close with the hand

worm gear box commonly used butterfly valve to drive the valve rod rotation

selection principles for when the valve stem torque is greater than 300 n. M with a driven gear box, gear box using the handwheel control at the same time, the hand wheel force is not greater than 300 meters.

3 butterfly Industrial Valves and the center line to the clamp worm gear and worm, the worm gear is the difference between butterfly valve?

structure is the same, just different from model, line refers to a eccentric butterfly valve structure way ( 371). , butterfly valve can be done to the clamp can also do 371, 373, etc. More detailed said can be centerline to the clamp type 1 single eccentric 2 double eccentric 3 is 371372373 line can be a flange connection can also be connected to the clamp

4, what is the difference between manual line with rubber butterfly valve with manual butterfly Industrial Valves?

look from the appearance, the difference between manual line with rubber butterfly valve and manual butterfly valve for:

( 1) , the general manual butterfly valve, valve plate is made of carbon steel, the surface looks have certain metallic luster.

( 2) And manual line with rubber butterfly valve, the valve plate lined with a layer of glue, seems to be no metal luster.

medium difference:

( 1) , manual butterfly valves cannot be used in the corrosive medium, mainly used in water medium.

( 2) , manual line with rubber butterfly valve can be used in a corrosive medium, because the manual line with rubber butterfly valve has a weak acid and alkali salt erosion performance.

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