My company manufacture ZJY46H piston type pressure reducing valve and diaphragm type pressure reducing valve is the difference of technical performance is the following:

serial number

ZJY46H piston type pressure reducing valve

differential pressure diaphragm type pressure reducing valve

project structure

characters

note

item

structure characteristics of the

note

1

the main valve structure

main regulating rod, main spring, cylinder liner piston assembly, streamlined throttling cone, outlet pressure lock lever

4 cavity structure make the control more sensitive and reliable; On the adjusting range is larger; Stress ratio can reach 10:1; Overall port their streamlined, medium flow regime is good, the noise is small; Simple and convenient maintenance; Volume and complex structure.

the main valve structure

diaphragm, diaphragm, disc, valve stem, plate type sealing disc

double cavity structure and double cavity water differential pressure control, pressure relief than 3:1; Plate type sealing disc medium flow difference, noise; Small volume, simple structure.

two

feedback control system

double feedback control system ( As spare) ; Piston valve ( Recoil sewage) ; Jet pump

as spare double feedback control system, can switch under the non-stop working condition; Piston valve to ensure safety operation; More sensitive can recoil emission control valve; Jet technology makes the main valve setting pressure more stable

feedback control system

upper and lower differential pressure diaphragm valve

3

outlet pressure ( P2) Stable stability

purple ping port power station P2 = 0. 4 mpa

outlet pressure ( P2) Relative poor stability

purple ping port power station P2 = 0. 4 mpa

4

running noises

60 decibels

ditto

running noises

70 decibels

ditto

5

the relief than

1

the relief than

three

6

P2 adjustable

0. 2 to 0. 8 mpa

P2 adjustable

0. 2 to 0. 5 mpa

7

flow

the same

flow

the same

and

adjustment way

feedback control system of jet technology combining pressure control and feedback control Industrial Valves; The main valve passive pressure cavity is not affected by the influence of inlet pressure P1.

when the large variation in P1; The P2 pressure stability is good;

when P2 flow change significantly; The P2 pressure stability is good;

upper and lower differential pressure diaphragm valve differential pressure control; P1 changes directly affect the regulation of

when the large variation in P1; The P2 pressure stability;

when P2 flow change significantly; P2 pressure stability

this is related to the principle diagram of the pressure reducing valve:

ZJY46H piston type pressure reducing valve

differential pressure diaphragm type pressure reducing valve

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