Self-Operated Control Valve

What is self-operated control valve Introduction? How does a self-operated control valve Introduction work?

Self-Operated Control Valve Introduction

ZZY type self-operated control valve doesn't need extra power, but take controlled media energy as power supply。 It brings in the actuator to control valve disk position and change two ends of different pressure and flow to make valve upstream and backstream pressure stability. It has agility, good sealing, the pressure set point small fluctuations and other advantage and it is used widely in gas, liquid, and steam medium to reduce and stable pressure or relieve pressure self-control. This series of products have reduced pressure by backstream pressure control (B type) and relieves pressure by upstream pressure control (K type). Pressure phase control scape: 15~250 KPa. It can satisfy clients working condition requirements as per need assemble.

ZZY Type Self-Operated control valve
ZZY Type Self-Operated control valve
Specification
Body type :Straight casing ball type body
Disk type :Quick open disk
Nominal diameter :DN20—300 , NPS 3/4''---12''
Nominal pressure :PN16—64 Class 150LB—300LB
Connection :Flange , FF. RF. RTJ and so on
Bonnet type :Bolted bonnet
Packing:V type PTFE
Sealing gasket :Metal clip graphite
Actuator:Film slef type 、Piston self type
Surface painting :Green Acrylic polyurethane enamel

Code

ZZYStructure typeNominal pressureBody materialMode of actionCondensationPressure control scope (KPa)Nominal diameter
Z series self-operation control valveP: Single-seat
M: Sleeve type
PN16=16
CL150LB=150 LB
C=WCB
LC=LCB
P=CF8
PL=CF3
R=CF8M
RL=CF3M
D=Special material
B:
Backstream pressure control
K:
Upstream pressure control
No: without
C: with condensation
15~50 40~80
60~140 120~220
160~220 200~260
240~300 280~350
330~400 380~450
480~560 540~620
600~700 680~800
780~900 880~1000
950~1500 1000~2500
DN50= DN50
NPS2〞=NPS2〞
For example: Single self-operated control valve, Nominal pressure PN16, WCB material, without condensation, pressure scope: 120—220KPa. Size DN50, Model: ZZYP-16C-B-120~220-DN50

Performance and parameter chart

Nominal diameter(DN)20253240506580100125150200250300
Rated KV7112030487512019030048076011001750
Rated travle(mm)81014202540506070
Nominal pressurePN 16、40、64  CLASS150LB~300LB
Pressure control scope
(Kpa)
15~50    40~80      60~140       120~220        160~220       200~260
240~300  280~350   330~400        380~450       480~560       540~620
600~700  680~800    780~900     880~1000        950~1500    1000~2500
* Control pressure chosen among adjustment scope is better
Flow characteristicQuick open
Accuracy of adjustment±5-10
Applicant temperature-40℃≤without condensation≤200℃≤with condensation≤350℃
allowable leakagehard seal(1/h)Single-seat:≤10-4 valve rated capacity(IV) Sleeve: ≤5×10-4 (II)valve rated capacity
Soft seal(1/h)0.150.300.450.600.901.74.06.7511.1016.0
Pressure reducing ratioMax.10
Min.1.25
Minimum upstream pressure
upstream pressure KPa3050100150200250300350400
Backstream pressure KPa15-2415-4015-8015-12020-16025-20030-24035-28040-320
upstream pressure KPa450500550600650700750800850
Backstream pressure KPa45-36050-40055-44060-48065-520170-56075-60080-64085-680
upstream pressure KPa900950100012501500200025003000
Backstream pressure KPa90-72095-760100-800125-1000150-1200200-1600250-2000300-2400

Material and applicable temperature

Chart 1: Body, bonnet material applicable and pressure scope(ANSI)

Temp
Class150Class300
SCPL1
LCB
SCPH2
WCB
SCPH21
WC6
SCS13A
CF8
SCS14A
CF8M
SCPL1
LCB
SCPH2
WCB
SCPH21
WC6
SCS13A
CF8
SCS14A
CF8M
-45~381.84--1.901.904.78--4.954.95
-5~381.841.961.991.901.904.785.105.164.954.95
501.811.921.921.841.844.725.005.104.774.80
1001.721.761.761.561.564.514.634.884.084.21
1501.571.571.571.391.394.404.514.633.623.85
2001.401.401.401.251.254.264.384.543.273.56
2501.201.201.201.161.164.054.164.443.043.34
3001.011.011.011.011.013.763.874.232.913.15
3500.840.840.840.840.843.593.694.012.813.03
3750.730.730.730.733.643.882.772.96
4000.640.640.640.643.443.652.742.91

Chart 2: Body, bonnet material applicable and pressure scope(GB)

Temp.
PN16PN25PN40
LCBWCBWC6CF8CF8MLCBWCBWC6CF8CF8MLCBWCBWC6CF8CF8M
-29~381.51.61.61.51.52.42.52.52.42.43.94.14.14.03.9
931.41.41.41.41.32.22.32.32.12.03.83.74.03.33.4
1491.31.31.31.31.22.12.12.11.91.93.73.63.83.03.1
2041.11.11.11.11.11.91.91.91.71.73.53.43.72.82.8
2600.81.01.01.01.01.71.71.71.51.63.33.23.52.62.6
3150.70.80.80.80.81.41.41.51.31.33.02.83.12.32.4
3430.60.70.70.70.71.31.31.41.21.22.92.73.02.32.3
3710.50.60.60.60.61.21.21.31.11.12.82.72.92.22.2
3990.50.50.50.50.51.11.11.21.01.02.52.62.72.12.2

Note:

  1. If temperature or pressure is in the middle of the showed figure, we can use interpolation to get Max working pressure or temperature.
  2. The pressure in the chart is all gauge pressure.

Standard material and inside structure

1BodyWCBCF8CF8M
2Seat304304316
3Disk304304316
4Gasket316+ graphit/PTEF
5Bellows combination304304316
6Connection plate20CF8CF8M
7Spring adjustment plate304304316
8BonnetWCBCF8CF8M
9York304304304
10PackingPTFE/ Flexible graphit
11Packing gasket304304316
12Spring60Si2Mn
13Stem304304316
14Upper spring seat304304304
15Connection plate20304304
16CapsuleA3304316
17DiaphragmNitrile rubber clamp polyester
18Push rod304304316
19Hex bolt45304316

Dimension and weight

Nominal diameterDN20253240506580100125150200250300
Face to face(L)150160180200230290310350400480600730850
Flange connection size(B)38351260386210231380180020002200
Pressure
control
scope
(Kpa)
15-140H4755205407107808408809159401000
A280308
200-500H455500520690760800870880900950
A230
120-300H450490510680750790860870890940
A176194280
480-1000H445480670740780850860880930
A176194280
600-1500H445570600820890950100011001200
A8596
1000-2500H445570600820980950100011001200
A8596
Weight(Kg)2637427290114130144180200250
Connecting pipe joint threadM1.6×1.5
  • Weight in chart is standard data without accessory. Matched export connection pipe and condensator are provide according to requirement.
  • As produce improved and technology innovation, size maybe be changed, plase contact Datian Valve technology  department to get new product information.

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