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

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
allowable leakage	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
Pressure reducing ratio	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
Temp ℃	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
Temp. ℃	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:

If temperature or pressure is in the middle of the showed figure, we can use interpolation to get Max working pressure or temperature.
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
	15-140	A	280		308
	200-500	H	455		500		520	690		760	800	870	880	900	950
	200-500	A	230
	120-300	H	450		490		510	680		750	790	860	870	890	940
	120-300	A	176					194			280
	480-1000	H	445		480			670		740	780	850	860	880	930
	480-1000	A	176					194			280
	600-1500	H	445		570		600	820		890	950		1000	1100	1200
	600-1500	A	85		96
	1000-2500	H	445		570		600	820		980	950		1000	1100	1200
	1000-2500	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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Self-Operated Control Valve

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