ZZYP Steam Pressure Reducing Valve (PRV)

ZZYP Steam Pressure Reducing Valve
ZZYP Steam Pressure Reducing Valve

Structural Features and Usages

ZZYP (Y945H / Y) electric double seat steam reducing valve consists of the body, Seat, Disc and other parts, adopting double-seat, dual-cone disc structure. Using pressure balance disc, through the disc lift regulating pressure can be equipped with ZKZ-BC type or other type straight stroke electric actuator to achieve remote control and automatic control.

The decompression ratio of this series products are used in 0.6 is more suitable.
This product is mainly used for steam pipes, adjusting the pressure. And it is widely used in combined heat and power, textile, printing and dyeing, petrochemical, sugar refining and other industries.

Dimensions & Constructral Diagram

Electric double seat steam reducing valve Constructral Diagram
Electric double seat steam reducing valve Constructral Diagram

Main Technical Parameters and Performance

Nominal Diameter 50 65 80 100 125 150 200 250 300 350 400 500
matched actuator type ZKZ-310BC ZKZ-410BC/ZKZ-510BC ZKZ-510BC ZKZ-610BC/ B+Z250/F1800
stroke 25 30 50/30 50 60 100
thrust(N) 4000 6400/1600 16000 2500
all stroke time(S) 20 32 37 62
input signal 4-20mA DC
power supply 220V 50Hz   380V 50Hz
basic error(%) ≤ ±2.5
basic error (%) ≤ ±1.5
basic error (%) ≤ 3
nominal pressure(MPa) 1.6 2.5 4.0 6.4 10.0 16.0
shell test pressure(MPa) 2.4 3.75 6.0 9.6 15.0 24
sealing test pressure(MPa) 1.76 2.75 4.4 7.04 11.0 17.6
maximum input pressure(MPa) 1.6 2.5 4.0 6.4 10.0 16.0
output pressure scope(MPa) best pressure reducing ratio0.6
leakage 0.5%QMax
temperature-pressure level ANSI B16.34

Shell test doesn’t include diaphrahm and cap

The Materials of Main Parts

part name part material
Body,bonnet,bottom cap WCB
seat 304
disc 410 S.S.
stem 410 S.S.
gasket flexible graphite/304 S.S.
guide sleeve 410 S.S.
packing flexible graphite
bolt 35CrMoA
nut 45

(Cv) Flow Coefficient

DN 50 65 80 100 125 150 200 250 300 350 400 500
Cv 15 20 35 60 70 110 150 230 420 540 710 1020

(PN1.6-4.0) External Dimensions

Nominal Diameter DN External Dimensions
L L1 H Hl
50 300 150 880 190
65 340 170 890 205
80 380 190 910 215
100 400 215 950 240
125 430 225 990 275
150 450 230 1090 320
200 500 260 1160 340
250 550 285 1230  

(PN6.4-16.0) External Dimensions

Nominal Diameter DN External Dimensions
L L1 H Hl
50 300 150 880 200
65 340 170 890 215
80 380 190 910 225
100 400 215 950 250
125 430 225 990 285
150 450 230 1090 330
200 500 260 1160 355
250 550 285 1230 390
300 750 395 1370 480
350 850 445 1450 550
400 950 550 1570 700
500 1130 680 1780 820