Pneumatic Regulated Control Valves

Pneumatic Regulated Control Valves (ZJHM type series pneumatic single-seat sleeve control valves) are small in shape, light in weight, high in performance and large in capacity, and are a new generation of general control valve control products. It is used for general fluid medium and process conditions of the production process control system.

Model

Inherent Regulation Ratio: 50:1
Nominal Pressure : 1.6 / 4.0 / 6.4 MPa
Service Temperature: -10 to 180℃
Ambient Temperature:-30 to 70℃
Air Supply Pressure : 0.14 / 0.25 / 0.40 KPa
Spring Range: 20 to 100(Basic Type) / 40 to 200 / 80 to 240 KPa

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Pneumatic Regulated Control Valves (pneumatic single-seat sleeve control valves)， consist of a pneumatic multi-spring film actuator and bottom flow resistance single-seat valve, the new actuator is low in height, light in weight, easy to equip, and the new valve body is compact, smooth flow channel, with a large flow coefficient.

▋ Performance

Flow characteristics		Straight, equal percentage, fast open
Adjustable range		50:1 (CV<6.3 30:1)
Rated CV value		Equal percentage CV1.6~630, straight CV1.8~690
The allowable amount of leakage		Hard seal: Class IV (0.01% valve rated capacity) Soft seal: Class VI (bubble class) Leakage standard: GB/T 4213
Performance metrics		Pneumatic	electric
	Fundamental Error %	±1.5	±1.0
	Differential %	≤1.5	≤1.0
	Dead Zone %	≤0.6	≤1.0
	Always point deviation %	±2.5	±2.5
	Rated stroke deviation %	≤2.5	≤2.5

▋ Select the parameter table

Seat Diameter(mm)		10	12	15	20	25	32	40	50	65	80	100	125	150	200
Rated flow factor Cv	equal percentages	1.6	2.5	4.0	6.3	10	16	25	40	63	100	160	250	400	630
Rated flow factor Cv	straight line	1.8	2.8	4.4	6.9	11	17.6	27.5	44	69	110	176	275	440	690
Nominal path	itinerary	Optional flow coefficient Cv (★ standard type ● recommended ○ customized)
DN20	16mm	●	●	●	★
DN25	16mm	●	●	●	●	★
DN32	25 mm	○	○	○	○	○	★
DN40			○	○	○	○	●	★
DN50				○	○	○	●	●	★
DN65	40mm						○	○	○	★
DN80							○	○	○	●	★
DN100							○	○	○	●	●	★
DN125	60mm									○	○	○	★
DN150											○	○	●	★
DN200											○	○	●	●	★
Pneumatic actuator Diaphragm effective area Ae (cm2)		ZHA/B-22					ZHA/B-23			ZHA/B-34			ZHA/B-45
Pneumatic actuator Diaphragm effective area Ae (cm2)		350					350			560			900
Mode of action	Spring range	Metal seal allowable differential pressure (MPa)
Air open	20-100KPa	4.46	3.09	1.98	1.16	0.7	0.44	0.28	0.18	0.17	0.11	0.07	0.07	0.05	0.03
	40-200 KPa	6.4	6.4	5.94	3.34	2.14	1.31	0.84	0.53	0.51	0.33	0.21	0.22	0.15	0.09
	80-240 KPa	6.4	6.4	6.4	6.4	4.99	3.05	1.95	1.25	1.18	0.78	0.5	0.51	0.36	0.21
Gas off	20-100KPa	6.4	6.19	3.96	2.23	2.14	0.87	0.56	0.35	0.34	0.22	0.14	0.15	0.1	0.06
	40-200 KPa	6.4	6.4	6.4	6.4	6.4	5.86	3.64	2.3	2.21	1.43	0.91	0.95	0.66	0.37
	80-240 KPa	6.4	6.4	6.4	6.4	6.4	6.4	5.04	3.18	3.06	1.98	1.26	1.32	0.92	0.52

▋ Material Options

Available in Stainless Steel 304, Stainless Steel 316, Carbon Steel, and Cr-Mo Steel to meet your requirement of temperature and mediums.

Also available in Cast Iron for your choice.

▋ Packaging

▋ Certification

▋ About COVNA

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