| Product Introduction |
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ZZY type self operated pressure regulating valve does not require external energy. It uses the energy of the regulated medium itself as a power source to introduce the actuator to control the position of the valve core, change the pressure difference and flow rate at both ends, and stabilize the pressure before (or after) the valve. It has the advantages of sensitive action, good sealing, and small pressure setting point wave power, and is widely used in automatic control of pressure reduction and stabilization or release and stabilization of gas, liquid, and steam media.
This series of products includes single seat (ZZYP), sleeve (ZZYM), double seat (ZZYN), and three structures; There are two types of actuators: membrane type and piston type; The types of action include pressure regulation after the pressure reducing valve (Type B) and pressure regulation before the pressure relief valve (Type K). The nominal pressure rating of the product includes PN16, 40, and 64; Valve body diameter range DN20-300; There are three levels of leakage: Level II, Level IV, and Level VI; The traffic characteristic is fast opening; The pressure is adjusted in stages from 15 to 2500Kpa. Can be combined as needed to meet user operating requirements.
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productcharacteristic
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The self operated pressure regulating valve of the pressure reducing valve does not require external energy and can work in places without electricity or gas, which is both convenient and energy-saving.
The pressure segmentation range is fine and intersecting with each other, with high adjustment accuracy.
The pressure setting value can be continuously set during operation.
For regulating the pressure after the valve, the ratio of the pressure before the valve to the pressure after the valve can be 10:1-10:8.
Rubber diaphragm type detection, with high precision and sensitive action of the actuator.
Adopting a pressure balance mechanism to make the regulating valve responsive and precise in control.
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| Material for main parts |
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Material for main parts
Valve body: ZG230-450、ZG1Cr18Ni9Ti 、ZGCr18Ni12Mo2Ti
Valve core: 1Cr18Ni9Ti, Cr18Ni12Mo2Ti
Valve seat: 1Cr18Ni9Ti, Cr18Ni12Mo2Ti
Valve stem: 1Cr18Ni9Ti, Cr18Ni12Mo2Ti
Membrane cover: A3, A3 steel coated with tetrafluoroethylene stainless steel
Packing: Nitrile, Ethylene Propylene, Fluorine, Oil Resistant Rubber
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Technical Parameter |
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Main technical parameters and performance indicators
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Nominal diameter DN (mm)
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20
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25
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32
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40
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50
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65
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80
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100
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125
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150
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200
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250
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300
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Rated flow coefficient (KV)
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7
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11
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20
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30
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48
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75
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120
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190
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300
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480
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760
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1100
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1750
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Rated stroke (mm)
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8
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10
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14
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20
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25
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40
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50
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60
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70
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Nominal pressure PN (Mpa)
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1.6, 4.0, 6.4
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Pressure regulation range (MPa a)
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15～50 40～80 60～100 80～140 120～180 160～220 200～260
240～300 280～350 330～400 380～450 430～500 480～560 540～620
600～700 680～800 780～900 880～1000 980～～2500
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Flow characteristics (℃)
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Quick open
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Adjustment accuracy (%)
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±5
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Operating temperature (℃)
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≤350
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Allowable leakage amount
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Hard seal (1/h)
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Single seat: ≤ Rated capacity of 10-4 valves (Class IV); Double seat, sleeve: ≤ 5 × 10 ˉ 3 valve rated capacity (Class II)
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Soft seal (m1/h)
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0.15
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0.30
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0.45
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0.60
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0.90
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1.7
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4.0
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6.75
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11.10
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16.0
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Pressure reducing ratio
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maximum
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10
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minimum
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1.25
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Dimension |
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External dimensions and weight
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Nominal diameter DN
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20
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25
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32
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40
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50
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65
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80
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100
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125
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150
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200
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250
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300
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Flange connection size B
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383
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512
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603
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862
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1023
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1380
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1800
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2000
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2200
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Flange end distance L
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150
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160
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180
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200
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230
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290
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310
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350
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400
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480
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600
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730
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850
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Pressure regulation range kpa
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15-140
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H
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475
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520
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540
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710
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780
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840
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880
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915
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940
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1000
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A
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280
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308
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280-500
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H
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455
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500
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520
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690
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760
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800
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870
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880
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900
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950
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A
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230
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120-300
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H
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450
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490
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510
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680
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750
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790
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860
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870
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890
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940
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A
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176
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194
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280
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480-1000
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H
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445
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480
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670
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740
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780
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850
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860
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880
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930
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A
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176
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194
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280
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600-1500
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H
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445
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570
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600
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820
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890
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950
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1000
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1100
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1200
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A
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85
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96
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1000-2500
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H
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445
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570
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600
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820
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890
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950
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1000
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1100
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1200
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A
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85
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96
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Weight kg
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26
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37
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42
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72
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90
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114
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130
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144
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180
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200
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250
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Accumulated lines on the pressure pipe joint
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M16×1.5
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Connection standards
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Flange standard: Casting method according to BG9113-88 JB/79-94
Flange sealing surface type: PN16 convex surface
PN40、 64 is concave convex, and the valve body is concave convex
Structure length according to BG12221-98
Execution mechanism signal interface: Internal thread M16 × 1.5
The distance between the body flange and the flange end face can be manufactured according to the standard specified by the user. For example: ANSI, JIS, DIN, etc.
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