INTRODUCTION

ZHD multistage minimum flow control valve cage control valve used multilevel cage symmetric sleeve control valve. It complete control medium velocitywithin valve, and greatly reduced noise made by high pressure gas or steam within valve, stabile multistage pressure reducing effective prevent liquid cavitation, so it’s the stable control valve used in high-pressure medium performance,customers can also select multi-spring diaphragm mechanism or pneumatic actuators, etc.

TEHNICAL PARAMETERS AND TECHNICAL PERFORMANCE

Body type: Direct casting ball-type valve
Nominal diameter:DN20, 25, 32, 40, 50, 65, 80, 100, 200
Nominal pressure:PN 1.6, 2.5, 4.0, 6.4, 10.0, 16,25Mpa CLASS 150, 300, 600, 900,1500Lb
Connection flange: FF, RF, RTJ, etc, welding: SW, BW
Flange distance: according to IEC534
Bonnet type: stdanrd type, lengthened (heat dissipation, low temperature, bellows sealing).
Packing: V type PTFE, flexible graphite, etc.
Sealing gasket: Metal with graphite gaskets
Actuator: Pneumatic, multi-spring actuator.
Electric: 3810L series, PSL series.
Valve disc type: multistage cage sleeve type.
Flow characteristics: equal percentage, linear.
Disc material: standard material composition and applicable temperature, pressure range, please refer to appendix.

CUSTOMERIZED SELECTION

Body	Type	Direct	Bonnet	Model	Standard,lengthened
	Material	WCB, WC9, 304, 316,etc.		Mterial	WCB, WC9, 304, 316,etc.
Disc	Characteristic	Linear, equal percentage, quick opening	Packing	V type PTFEFlexible graphite,bellow sealing
	Material	304, 304+STL/PTFE, 316, 316+STL/PTFE
Actuator	Pneumatic:See appendix6
	Electric: See appendix6
Positioner	Electric valve positioner, intelligent digital positioner
Accessories	Solenoid valve, valve position feedback device, hand operate mechanism,lock-up valve,air filter pressure relief device etc.

MODEL SELECTION

Z	R:3810L series	H:Linear actuator	D: multistage cage sleeve type	-16:PN1.6Mpa	C:Carbon steel		DN 20Size:20mm
	P: PSL series				P: Chromium-Nickel- titanium Steel
	J:Pneumatic diaphragm			-150LB:CL 150LB	I: Chromium-molybdenum steel	-B:Air to close	IN 1''Size: 1''
	H:Linear cylinder				V: Chrominm-molybdenum-vanadium steel	-K:Ai r to open

BODY IS CAST STEEL

1	Seat	25	LF2	F22
2	Nut	25	35	25Cr2Mo1VA
3	Stud	35	40MnB	25Cr2Mo1VA
4	Gasket	316+graphite/PTFE
5	Body	25	LF2	F22
6	Seat	304	304	304
7	Stem	304	304	304
8	Stud	35	40MnB	25Cr2Mo1VA
9	Nut	25	35	25Cr2Mo1VA
10	Gasket	316+graphite/PTFE
11	Packing gasket	304	304	304
12	Stuffing	PTFE/Flexible graphite
13	Bonnet	25	LF2	F22
14	Pressing sleeve	304	304	304
15	Gland	25	LF2	F22
16	Nut	35	40MnB	25Cr2Mo1VA
17	Stud	25	35	25Cr2Mo1VA

APPENDIX3: BODY MATERIAL IS STAINLESS STEEL

1	Sest	CF8	CF8M		CF3M
2	Nut	304	316		316L
3	Stud	304	316		316L
4	Gasket	316+graphite/PTFE
5	Body	CF8	CF8M	CF3M
6	Seat	304	316	316L
7	Setm	304	316	316L
8	Stud	304	316	316L
9	Nut	304	316	316L
10	Gasket	316+Graphite/PTFE
11	Stuffing gasket	304	316	316L
12	Stuffing	PTFE/Flexible graphite
13	Bonnet	CF8	CF8M	CF3M
14	Pressing sleeve	304	316	316L
15	Gland	CF8	CF8M	CF3M
16	Stud	304	316	316L
17	Nut	304	316	316L

NOTE

The above is standard configuration structure, valve seat is metal to metal, and we can still provide strengthed trim with stellite alloy coating. For specific applicable temperature, we have more reasonable bolts, nuts for choose.
PTFE v-shaped ring stem packing is standard configuration and can also choose flexible graphite.
Standard body material is carbon steel and stainless steel, and we can still provide various high corrosive-resistance alloy materials.

CONTROL VALVE STRUCTURAL SIZE

Valve size		L		Pneumatic			Electric
inch	mm	PN100-320	PN 420	H1 mm	H2 mm	A mm	H1 mm	H2 mm	A mm
1''	25	279	318	140	690	360	140	1005	270
11/2''	40	330	359	153	770	360	153	1025	270
2''	50	375	400	153	770	360	153	1025	270
3''	80	460	498	170	900	470	170	1095	310
4''	100	530	575	190	932	470	190	1120	310
6''	150	768	819	223	950	560	223	1170	350
8''	200	832	1029	265	990	560	265	1220	350
Since product and technical innovation or some special requirements, connection size of various valves may change, please contact with JOTO valve Technical Department to get the latest product information. We can also produce according to your required size.