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Electronic electric two-seat regulating valve

ZDSN type electric two-seat regulating valve is equipped with PS series and other straight stroke electric actuators. It does not need to be equipped with servo amplifier. It can be controlled by input control signal (4-20mADC or 1-5VDC) and single-phase power supply to realize the adjustment of pressure, flow rate, temperature, liquid level and other parameters. It is suitable for clean occasions with lax leakage requirements and large pressure difference. Electronic electric two-seat control valve can be widely used in electric power, metallurgy, petroleum, chemical, light industry, environmental protection and other industries in the industrial process automatic control system.

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Heavy machinery | Power station auxiliary equipment | Engineering general contracting | Mining machinery | Environmental protection equipment

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Electronic electric two-seat regulating valve

1. valve body
Form: Straight-through casting valve
Nominal diameter: 20-300mm
Nominal pressure: PN1.6 4.0 6.4MPa
Connection form: flange type JB79-59 by JB78-59
Material: HT200 ZG230-450 ZG1Cr18Ni9Ti ZG0Cr18Ni12Mo2Ti

2. upper valve cover
Normal temperature type:-20 ℃- 200 ℃
Heat dissipation type:-40 ℃- 450 ℃
Gland form: bolt compression type
Packing: V-shaped PTFE packing, flexible graphite, stainless steel bellows

3. valve inner assembly
Spool form: double guide single seat plunger spool
Flow characteristics: equal percentage characteristics, straight line characteristics and quick opening characteristics
Material: 1Cr18Ni9Ti 0Cr18Ni12Mo2Ti

4. implementing agency

Type: optional PS, 3810 series electronic straight stroke actuator.

Explosion-proof type selection 3810 series

Technical parameters and performance: please refer to the corresponding actuator and valve positioner

Instructions.

5. main parts materials and recommend temperature range

Valve body material	Nominal pressure MPa	Medium working temperature ℃
		<	<	<	<	<	<	<	<	<	<	<	<	<	<
		120	200	250	300	350	400	425	450	475	500	525	550	575	600
		Upper limit of working pressure MPa
Cast Iron HT200	1.6	1.6	1.5
Cast steel ZG25	4.0 6.4		4.0 6.4	3.7 5.9	3.3 5.2	3.0 4.7	2.8 4.1	2.3 3.7	1.8 2.9
Stainless Steel ZG1Cr18Ni9Ti	4.0 6.4					4.0 6.4	3.0 4.4	2.7 4.2	2.4 4.0	2.1 3.8	1.9 3.5	1.7 3.4	1.4 3.2	1.1 2.9	0.8 2.6

Main technical parameters of 6.

Nominal diameter DN		20	25	32	40	50	65	80	100	125	150	200	250	300
Valve seat diameter dn(mm)		20	25	32	40	50	65	80	100	125	150	200	250	300
Rated flow coefficient Kv			10	16	25	40	63	100	160	250	400	630	1000	1600
Stroke mm		10	16		25		40			60			100
Basic error%		±1.0
Return%		1.0
Dead Zone%		1.0
Always Point Deviation%		±2.5
Rated travel deviation%		2.5
Allowable leakage Q		0.05% of Class III Kv value as per GB4213-84 standard
Adjustable range		50:1
Nominal pressure Medium temperature Valve body material	1.6MPa	Normal temperature -20 ℃ ~ 200 ℃ cast iron HT200
	4.0MPa	Normal temperature -40 ℃ ~ 200 ℃ cast steel ZG25 cast stainless steel ZG1Cr18Ni9Ti
		Medium Temperature -40 ℃ ~ 450 ℃ Cast Steel ZG25 Cast Stainless Steel ZG1Cr18Ni9Ti
	6.4MPa	Normal temperature -20 ℃ ~ 200 ℃ cast steel ZG25 cast stainless steel ZG1Cr18Ni9Ti
		Medium Temperature -40 ℃ ~ 450 ℃ Cast Steel ZG25 Cast Stainless Steel ZG1Cr18Ni9Ti

Allowable 7. pressure difference

Nominal diameter	25	40		50	65	80	100	150		200	250	300
Seat diameter (mm)	25	32	40	50	65	80	100	125	150	200	250	300
implementing agency	Allowable pressure difference ΔP(Mpa)
PSL202	6.4	6.4	6.4	5.10
PSL204					6.4	6.4	5.62
PSL208								6.4	5.31	3.97
PSL320											6.4	4.14

8. Mounting Dimensions and Weight (ZDSN)

Nominal diameter DN（mm）	L(mm)			H1 mm	H(mm)		R mm	Weight (kg)
	PN(MPa)				Normal temperature	medium temperature		1.6 MPa	4.0 6.4Mpa
	1.6	4.0	6.4		Normal temperature	medium temperature		1.6 MPa	Normal temperature	medium temperature
25	185	190	205	117	746	897	176	14	18	21
32	200	210	220	120	752	903	176	16	19	22
40	220	230	240	139	791	942	176	18	28	32
50	250	255	265	144	801	952	176	22	32	36
65	275	285	295	188	930	1081	176	53	57	65
80	305	310	325	208	960	1111	176	62	67	77
100	350	355	370	220	984	1135	176	86	97	108
125	410	425	440	270	1167	1382	225	98	118	135
150	450	460	475	280	1187	1402	225	160	178	198
200	550	560	570	320	1271	1486	225	294	328	358
250	670	740	750	440	1510	1725	225
300	770	805	820	502	1634	1849	225

9. Model Preparation Instructions

Z	D	S	P	40	P	G
automatic control valve	Type of actuator:	Displacement characteristics:	Valve structure:	Nominal pressure:	Body Material:	Temperature Type:
	D: PS Series	S: indicates straight stroke	P: indicates single seat	16: means 1.6MP	C: indicates carbon steel	G: medium temperature type Normal temperature omitted
	R: indicates 3810 series		N: means two-seat	40: 4.0MP	P: Indicates stainless steel Cast iron omitted
	H: DKZ series			64: means 6.4MP
	C: indicates other series

10. order notice:
1. Product model and name, 2. Nominal diameter DN(mm), 3. Nominal pressure, 4. Flow characteristics, 5. Body material, 6. Rated flow coefficient, 7. Medium type and temperature range, 8. Pressure (differential pressure) before and after the valve, 9. Power supply voltage and control signal, 10. Other special requirements.

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