ZDM Series Automatic Recycle Valve | Global Trade leader ecrobot

Product

ZDM Series Automatic Recycle Valve

Posting date : May 04, 2017

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Membership

Free Member Scince Apr 12, 2017

FOB Price

51888

Min. Order Quantity

Supply Abillity

10000

Port

SHANGHAI

Payment Terms

T/T

Package

seaworthy packing

Keyword :

Automatic Recycle Va

CHARACTERISTIC

Prevent cavitation multistage decompression bypass, reducing velocity, suitable for high pressure conditions
Forgde valve body, or you can choose carbon steel or stainless steel material, etc.
Standard bypass non-return function, maximum working pressure differential is 30MPa.
Pressure grade from PN16 to PN420, diameter from DN2to DN500.
Can select manual bypass operation function, used in fault.

SIZE AND PRESSURE RANGE

Body type: Three-way forged valve
Nominal diameter: DN25, 32, 40, 50, 65, 80,100, 200, 250, 300, 350, 400, 450, 500
Nominal pressure: PN 16,25,40,64,100,160,250,420 CLASS 150, 300, 600, 900, 1500, 2500LB
End connection: Flange, FF, RF, RTJ, BW, SW etc.

MATERIAL TEMPERATURE RANGE

Body MaterialSealing Materuial	A105	LF2	F304	F316
NBR	-20～+100	-30～+100	-30～+100	-30～+100
FKM	-20～+200	-40～+200	-40～+200	-40～+200
PTFE	-20～+230	-40～+230	-80～+230	-80～+230
Stainless steel gasket	-20～+300	-40～+300	-196～+300	-196～+300

WORKING PRINCIPLE

According to the difference of inductive main flow, main valve disc check cone of automatic recirculation valve will automatically move to a certain position. At the same time the main valve disc drive bypass valve stem, transfer the movement of main valve disc to bypass, through control bypass valve disc position, change bypass throttling area, so as to control bypass flow. When main valve disc back into valve seat closed, all flow backflow through bypass. When mian valve disc to rise to top position, bypass is fully closed, all the flow of pump flow to process system. This valve set four functions in one body.
Flow perception: automatic recirculation valve main valve disc can automatically perceive main flow of process system, thereby according to the flow to determine position of mian valve disc and bypass disc.
Recirculation control: automatic recirculation valve can inhaled pump normal operation required minimum flow into storage device through bypass, so as to adjust pump H – Q characteristics, to realize recycling.
Bypass multistage pressure reducing: bypass control system can reduced the backflow medium from high-pressure pump outlet to appropriate backflow to low-pressure storage device with low noise small wear.
Check: automatic recirculation valve also has check valve effect, preventing the liquid backflow to pump body. Bypass non return function is standard.
Special bypass size can be customized. The max flow rate of bypass is subject to the max Kv value.

SIZE

Valve Size	Mm	25	32	40	50	65	80	100	125	150	200	250	300
	in	1	11/4	11/2	2	21/2	3	4	5	6	8	10	12
Max main flow	m3/h	12	28	30	50	100	114	200	400	455	750	1250	1650
Bypass size	mm	15	20	20	25	40	40	50	50	65	80	100	125
	in	1/2	3/4	3/4	1	11/2	11/2	2	2	21/2	3	4	5
Max bypass Kv	Cv	1.0	1.9	1.9	2.7	5.2	5.2	8.5	8.5	11	14	22	35

Note: Valve mian ouelet size depends on the outlet size of pump.

MODEL SELECTION

ZD	M	Nominal Pressure	Body Material	Nominal Diameter	/Bypass Diameter	Structure Type
Automatic Recycle pump protection valve	M type bypass assembly	PN16=PN16Class 150LB=CL150	C=A105LC=LF2P=304PL=304LR=316RL=316LD=Customrized material	DN50=50NPS2”=2”	DN25=25 NPS1”=1”	V = vertically mountedH = horizontally mountedS = Manual startup
Such as: M automatic recirculation valve, PN40,body material is WCB,main diameter DN50 bypass diameter DN25,(vertically mounted, Model: ZDM-PN40-C-50/25-V

NOTE

Other bypass size can be made according to client’s requirements, maximum bypass flow depends on maximum Kv value.

INSTALLATION

automatic recirculation valve should be installed nearby the centrifugal pump need Protect as soon as possible, and be better to install the outlet of pump.Distance between pump outlet and inlet should not exceed 1.5 meters, in order to preventing from liquid pulsing cause low-frequency water attack. Medium flows from top to bottom. Priority should be installed vertically, also can be installed horizontally.

MAINTENANCE

Maintenance and installation according manual provided, inspect the pump weekly in routine, and at the same time inspect valve functions.

MAIN PARTS AND DIMENSION

NO	Name	Material		NO	Name	Material
1	Body	A105	F304	16	Disc setting	2Cr13	304
2	Disc	EPDM	EPDM	17	O ring	EPDM	EPDM
3	Guide ring	2Cr13	304	18	O ring	EPDM	EPDM
4	Valve plunger	2Cr13	304	19	Elastic cylindrical pin	2Cr13	304
5	Spring	60Si2Mn	1Cr18Ni9Ti	20	O ring	EPDM	EPDM
6	O ring	EPDM	EPDM	21	O ring	EPDM	EPDM
7	Guide block	2Cr13	304	22	Recycle body	A105	F304
8	Bonnet	A105	F304	23	Recycle cage	2Cr13	304
9	Nut	35	0Cr18Ni9	24	Recycle disc	2Cr13	304
10	Stud	45	0Cr18Ni9	25	O ring	EPDM	EPDM
11	Plunger pin	2Cr13	304	26	Orifice plate	2Cr13	304
12	Disc block	2Cr13	304	27	O ring	EPDM	EPDM
13	O ring	EPDM	EPDM	28	Nut	35	0Cr18Ni9
14	Bonnet	2Cr13	304	29	Bolt	45	0Cr18Ni9
15	Nut	0Cr18Ni9	0Cr18Ni9

DIMENSION AND WEIGHT

DN（IN）	PN(Bar)	CLASS	DNB（IN）	L(Mm)	S(Mm)	H(Mm)	重量(Kg)
25(1″)	10-16-25-40	150-300LB	25(1″)	190	153	73	17
25(1″)	63-100	600 LB	25(1″)	250	182	90	32
32(1″)	10-16-25-40	150-300LB	25(1″)	190	153	73	19
32(1″)	63-100	600 LB	25(1″)	250	182	90	32
40(11/2″)	10-16-25-40	150-300LB	25(1″)	200	155	75	19
	63-100-160	600-900 LB		260	190	90	32
	250	1500LB		300	215	120	43
50(2″)	10-16-25-40	150-300LB	25(1″)	230	163	90	27
	63-100-160	600-900 LB		300	185	115	41
	250	1500LB		350	223	130	59
65(21/2″)	10-16-25-40	150-300LB	40(11/2″)	290	184	110	42
	63	600 LB		340	219	125	60
	100-160	900 LB		340	227	125	69
	250	1500LB		400	260	145	89
80(3″)	10-16-25-40	150-300LB	40(11/2″)	310	191	115	52
	63	600 LB		380	233	140	74
	100-160	900 LB		380	240	140	84
	250	1500LB		450	265	165	122
100(4″)	10-16-25-40	150-300LB	50(2″)	350	221	125	81
	63	600 LB		430	258	155	112
	100-160	900 LB		430	266	155	126
	250	1500LB		520	300	190	106
125(5″)	10-16-25-40	150-300LB	50(2″)	400	266	135	122
	63	600 LB		500	280	175	182
	100-160	900 LB		500	291	175	207
	250	1500LB		600	321	215	200
150(6″)	10-16-25-40	150-300LB	65(21/2″)	480	295	165	138
	63	600 LB		550	350	190	273
	100-160	900 LB		585	355	200	289
	250	1500LB		700	405	250	444
200(8″)	10-16-25-40	150-300LB	80(3″)	600	395	200	241
	63	600 LB		650	405	215	467
	100-160	900 LB		680	430	225	501
	250	1500LB		830	485	290	785
250(10″)	10-16-25-40	150-300LB	100(4″)	730	475	240	411
	63	600 LB		775	520	260	714
	100-160	900 LB		800	560	270	857
	250	1500LB		900	560	310	1284
300(12″)	10-16-25-40	150-300LB	125(5″)	850	530	280	740
	63	600 LB		900	550	300	930
	100-160	900 LB		1050	650	360	1485
	250	1500LB		1200	720	420	2100

INTRODUCTION ZDM Series Automatic Recycle Valve (ARC valve) is a kind of pump protection device. It automatic protect centrifugal pump when pump body occur cavitation damage or unstable (especially conveying hot water at low load operation medium). Once pump flow is lower than the preseted flow, bypass can completely open to ensure the minimum required flow pump. Even running fully closed, namely running flow is zero, the minimum flow can also pass bypass for Automatic Recycle. Pressure reduced through the multistage bypass pressure reducing valve. ZDM series Automatic Recycle Valve is suitable for bypass with high pressure differential, maximum pressure differential is 30MPa, and specific choice is determined by factory. Multistage decompression type M type bypass can eliminate noise made by high-speed flow medium, prevent damage of cavitation erosion and braising to valve components.