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Self-Operated Control Valve

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

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

ZZY Structure type Nominal pressure Body material Mode of action Condensation Pressure control scope (KPa) Nominal diameter
Z series self-operation control valve P: 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） 20 25 32 40 50 65 80 100 125 150 200 250 300
Rated KV 7 11 20 30 48 75 120 190 300 480 760 1100 1750
Rated travle（mm） 8 10 14 20 25 40 50 60 70
Nominal pressure PN 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 characteristic Quick open
Accuracy of adjustment ±5-10
Applicant temperature -40℃≤without condensation≤200℃≤with condensation≤350℃
allowable leakage hard seal（1/h） Single-seat:≤10-4 valve rated capacity（IV） Sleeve: ≤5×10-4 （II）valve rated capacity
Soft seal（1/h） 0.15 0.30 0.45 0.60 0.90 1.7 4.0 6.75 11.10 16.0
Pressure reducing ratio Max. 10
Min. 1.25
Minimum upstream pressure
upstream pressure KPa 30 50 100 150 200 250 300 350 400
Backstream pressure KPa 15-24 15-40 15-80 15-120 20-160 25-200 30-240 35-280 40-320
upstream pressure KPa 450 500 550 600 650 700 750 800 850
Backstream pressure KPa 45-360 50-400 55-440 60-480 65-520 170-560 75-600 80-640 85-680
upstream pressure KPa 900 950 1000 1250 1500 2000 2500 3000
Backstream pressure KPa 90-720 95-760 100-800 125-1000 150-1200 200-1600 250-2000 300-2400

Material and applicable temperature

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

Temp
℃		 Class150 Class300
SCPL1
LCB		 SCPH2
WCB		 SCPH21
WC6		 SCS13A
CF8		 SCS14A
CF8M		 SCPL1
LCB		 SCPH2
WCB		 SCPH21
WC6		 SCS13A
CF8		 SCS14A
CF8M
-45~38 1.84 - - 1.90 1.90 4.78 - - 4.95 4.95
-5~38 1.84 1.96 1.99 1.90 1.90 4.78 5.10 5.16 4.95 4.95
50 1.81 1.92 1.92 1.84 1.84 4.72 5.00 5.10 4.77 4.80
100 1.72 1.76 1.76 1.56 1.56 4.51 4.63 4.88 4.08 4.21
150 1.57 1.57 1.57 1.39 1.39 4.40 4.51 4.63 3.62 3.85
200 1.40 1.40 1.40 1.25 1.25 4.26 4.38 4.54 3.27 3.56
250 1.20 1.20 1.20 1.16 1.16 4.05 4.16 4.44 3.04 3.34
300 1.01 1.01 1.01 1.01 1.01 3.76 3.87 4.23 2.91 3.15
350 0.84 0.84 0.84 0.84 0.84 3.59 3.69 4.01 2.81 3.03
375 0.73 0.73 0.73 0.73 3.64 3.88 2.77 2.96
400 0.64 0.64 0.64 0.64 3.44 3.65 2.74 2.91

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

Temp.
℃		 PN16 PN25 PN40
LCB WCB WC6 CF8 CF8M LCB WCB WC6 CF8 CF8M LCB WCB WC6 CF8 CF8M
-29~38 1.5 1.6 1.6 1.5 1.5 2.4 2.5 2.5 2.4 2.4 3.9 4.1 4.1 4.0 3.9
93 1.4 1.4 1.4 1.4 1.3 2.2 2.3 2.3 2.1 2.0 3.8 3.7 4.0 3.3 3.4
149 1.3 1.3 1.3 1.3 1.2 2.1 2.1 2.1 1.9 1.9 3.7 3.6 3.8 3.0 3.1
204 1.1 1.1 1.1 1.1 1.1 1.9 1.9 1.9 1.7 1.7 3.5 3.4 3.7 2.8 2.8
260 0.8 1.0 1.0 1.0 1.0 1.7 1.7 1.7 1.5 1.6 3.3 3.2 3.5 2.6 2.6
315 0.7 0.8 0.8 0.8 0.8 1.4 1.4 1.5 1.3 1.3 3.0 2.8 3.1 2.3 2.4
343 0.6 0.7 0.7 0.7 0.7 1.3 1.3 1.4 1.2 1.2 2.9 2.7 3.0 2.3 2.3
371 0.5 0.6 0.6 0.6 0.6 1.2 1.2 1.3 1.1 1.1 2.8 2.7 2.9 2.2 2.2
399 0.5 0.5 0.5 0.5 0.5 1.1 1.1 1.2 1.0 1.0 2.5 2.6 2.7 2.1 2.2

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

1 Body WCB CF8 CF8M
2 Seat 304 304 316
3 Disk 304 304 316
4 Gasket 316+ graphit/PTEF
5 Bellows combination 304 304 316
6 Connection plate 20 CF8 CF8M
7 Spring adjustment plate 304 304 316
8 Bonnet WCB CF8 CF8M
9 York 304 304 304
10 Packing PTFE/ Flexible graphit
11 Packing gasket 304 304 316
12 Spring 60Si2Mn
13 Stem 304 304 316
14 Upper spring seat 304 304 304
15 Connection plate 20 304 304
16 Capsule A3 304 316
17 Diaphragm Nitrile rubber clamp polyester
18 Push rod 304 304 316
19 Hex bolt 45 304 316

Dimension and weight

Nominal diameterDN 20 25 32 40 50 65 80 100 125 150 200 250 300
Face to face（L） 150 160 180 200 230 290 310 350 400 480 600 730 850
Flange connection size（B） 383 512 603 862 1023 1380 1800 2000 2200
Pressure
control
scope
（Kpa）		 15-140 H 475 520 540 710 780 840 880 915 940 1000
A 280 308
200-500 H 455 500 520 690 760 800 870 880 900 950
A 230
120-300 H 450 490 510 680 750 790 860 870 890 940
A 176 194 280
480-1000 H 445 480 670 740 780 850 860 880 930
A 176 194 280
600-1500 H 445 570 600 820 890 950 1000 1100 1200
A 85 96
1000-2500 H 445 570 600 820 980 950 1000 1100 1200
A 85 96
Weight（Kg） 26 37 42 72 90 114 130 144 180 200 250
Connecting pipe joint thread M1.6×1.5
  • 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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