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KAI WEI XI CHAN PIN FEN LEI

ZDLN Electronic Electric Double-Seated Control Valve
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Phone：+86（577）6730 7899
Mobile：+86 195 1816 9569
Fax：+86（577）6738 7099
Email：Lucas@kaiweixi.com
Address：No. 1, Linxia Road, Oubei Street, Yongjia County, Wenzhou City, Zhejiang Province,china
Website：https://www.kaiweixi.com

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ZDLN Electronic Electric Double-Seated Control Valve

Model：ZDLN-16C/ZDLN-25C/ZDLN-40C/ZDLN-64C/ZDLN-16P/ZDLN-25P/ZDLN-40P/ZDLN-64P//ZDLN-16R/ZDLN-25R/ZDLN-40R/ZDLN-64R
Specification：DN20-DN300
Temperature：-250℃-560℃
Medium：Coal gas, natural gas, LPG, petroleum gas, nitrogen, etc.

Pressure：PN16,PN25,PN40,PN64
Connection method：flange
Driving method：Electric
Material：Cast Steel,Stainless Steel,Duplex Stainless Steel

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ZDLN Electronic Electric Double-Seated Control ValveOverview

ZDLN electronic electric straight-through double-seated regulating valve is an industrial automation control valve consisting of an electronic electric actuator and a high-performance straight-through double-seated valve body. This valve integrates advanced servo control technology, eliminating the need for an external servo amplifier as it can directly receive 4-20mA DC or 1-5V DC standard analog signals from control systems such as PLC or DCS. The actuator, through its built-in electronic module, efficiently converts electrical energy into linear displacement to drive the valve stem, causing precise vertical movement of the double valve plugs relative to the double seats. By utilizing the change in throttling area between the double plugs and seats, it adjusts the fluid flow area in real-time to achieve accurate control of process parameters like flow rate, pressure, temperature, and liquid level. Due to its double-seated balanced plug structure, most of the unbalanced forces acting on the upper and lower plugs from the medium can cancel each other out, giving the valve significant features such as high allowable pressure differential, large flow capacity, excellent dynamic stability, and superior vibration resistance. It is particularly suitable for automated processes with high flow rates, high pressure drops, and relatively relaxed leakage requirements.

Product Image of ZDLN Electronic Electric Straight-through Double-seated Regulating Valve

ZDLN Electronic Electric Double-Seated Control ValveCharacteristic

1.Electronic integrated drive:Equipped with an integrated electronic electric actuator with a built-in servo system and position feedback module, significantly simplifying system wiring and reducing space requirements without the need for an external servo amplifier.
2.Excellent force balance characteristics:The double-seated plug design allows the unbalanced forces acting on the upper and lower plugs from the fluid to mostly cancel each other out. Compared to single-seated valves, it possesses superior self-balancing capability and high allowable pressure differential, easily handling high-pressure drop conditions.
3.Significant flow capacity:The straight-through double-seated flow path design provides a larger flow coefficient (Kv value) than a single-seated valve of the same nominal diameter. Its performance is especially outstanding in industrial networks requiring high-flow control.
4.Good dynamic operational stability:Due to the minimal fluid disturbance forces acting on the plugs, the valve exhibits strong anti-vibration performance and smooth operation during regulation, making it ideal for control systems with large pressure fluctuations or frequent cycling.
5.Agile and precise response:The actuator features high resolution and a minimal dead zone, accurately capturing small signal fluctuations (e.g., 4-20mA) and executing valve position compensation instantly to ensure timely dynamic response and minimal steady-state error.
6.Intelligent safety protection:The actuator includes overload, stall, and over-temperature protection. In the event of signal interruption or power failure, it can execute logical protection based on preset safety positions (full open, full close, or fail-in-place).
7.Material and environmental adaptability:Body materials include cast steel, stainless steel, and various special alloy steels, compatible with water, steam, oil, and general chemical media across power, metallurgical, chemical, and textile sectors.
8.Mature structure and easy maintenance:Utilizing a classic double-seated guiding structure, the technology is mature and reliable. Key internals adopt a standardized design, making disassembly, cleaning, and replacement of wearing parts relatively convenient while reducing comprehensive operation and maintenance costs.

ZDLN Electronic Electric Double-Seated Control Valvestructure principle

Structural Drawing of ZDLN Electronic Electric Straight-through Double-seated Regulating Valve

List of Component Names and Materials

Name	Material
Valve body	Cast Steel,Stainless Steel,Duplex Stainless Steel
Bonnet	HT200, ZG230-450, ZG1Cr18Ni9Ti
Valve core	1Cr18Ni9Ti, Stellite alloy surfacing
Packing	PTFE, flexible graphite, stainless steel bellows
Valve stem/push rod	2Cr13, 1Cr18Ni9Ti
Gasket	Rubber asbestos board, 1Cr18Ni9Ti, graphite spiral wound gasket
Bush	2Cr13

ZDLN Electronic Electric Double-Seated Control Valvetechnology parameter

Performance Specification Sheet

Performance Specification Sheet
Nominal Pressure	1.6	2.5	4.0	6.4	MPa
Strength test pressure	2.4	3.8	6.0	9.6
Sealing test pressure	1.76	2.8	4.4	7.04
Applicable Temperature	-250-560				℃

ZDLN Electronic Electric Double-Seated Control Valvestandard size

Standard requirements for external dimensions

1. The structural length of the valve shall comply with the standard of GB/T12221

2. Connecting flanges according to GB/T17241.6 standard

Outline Drawing of ZDLN Electronic Electric Straight-through Double-seated Regulating Valve

Outline dimension table(Unit: mm)

Nominal Diameter(DN)		20	25	32	40	50	65	80	100	125	150	200	250	300
Flange Distance(L)	PN16	180	185	200	220	250	275	305	350	410	450	550	670	770
	PN40	185	190	210	230	255	285	310	355	425	460	560	690	795
	PN64	190	200	220	240	265	295	320	370	400	475	570	752	819
Room temperature valve coverH1	Single Seat	625	660	672	817	847	1127	1143	1151	1279	1304	1369	1682	1823
Room temperature valve coverH1	Double Seat		670	676	837	847	1147	1177	1201	1329	1354	1429	1802	1923
Medium Temp Type Bonnet H1	Single Seat	825	860	892	1017	1047	1377	1393	1401	1599	1624	1689	2032	2171
Medium Temp Type Bonnet H1	Double Seat		870	876	1037	1047	1397	1427	1451	1649	1674	1749	2152	2273
H2	Single Seat	91	112	118	129	144	173	191	195	243	251	290	380	436
H2	Double Seat		117	120	139	144	188	208	220	268	278	320	441	465
H3		87			90
ФD		225					257				310
Flange Standard		GB：1.6、2.5、4.06.4Mpa ANSI：150、300、600Lb JIS：10K、20K、30K

*The performance indicators of this product comply with GB/T4213-92

Articles related to technology research and development

Dynamic balance electric control valve Patent

The utility model provides a dynamically balanced electric regulating valve, which includes a valve body, a valve cover, a valve rod, a valve core installed inside the valve body and connected to the valve rod, and an actuator installed on the valve cover and connected to the top end of the valve rod. The valve body is internally provided with a water inlet chamber, a valve cavity, and a water outlet chamber in order towards the direction of medium flow. The valve core is in the shape of a bucket with its opening facing downwards. The valve core is located inside the valve cavity and is used for connecting or cutting off between the water inlet chamber and the valve cavity. The top of the valve core is provided with a through port for medium circulation. Above the through port, there is a filter cover detachably connected to the valve core. The valve rod is provided with a step, and the outside of the step is covered with an elastic sleeve that fits it. The top of the filter cover is provided with a fixing hole that fits the elastic sleeve. This utility model can filter the medium, is simple to install, time-saving, labor-saving, and can reduce the medium pressure inside the valve body, extending the service life of the valve core.
1. A dynamic balance electric regulating valve, comprising a valve body, a valve cover, a valve rod, a valve core installed inside the valve body and connected to the valve rod, and an actuator installed on the valve cover and connected to the top end of the valve rod. Its characteristic lies in that the valve body is sequentially provided with an inlet chamber, a valve cavity, and an outlet chamber in the direction of medium flow. The valve core is in the shape of a bucket with an opening facing downwards. The valve core is located inside the valve cavity and is used for connecting or cutting off between the inlet chamber and the valve cavity. The top of the valve core is provided with a port for medium circulation. Above the port, there is a filter cover detachably connected to the valve core. The valve rod is provided with a step, and the outside of the step is covered with an elastic sleeve that fits it. The top of the filter cover is provided with a fixing hole that fits the elastic sleeve.
2. A dynamic balance electric regulating valve according to claim 1, characterized in that the bottom of the valve body is provided with a downward-opening groove, which is connected to the valve cavity through a through hole. A bottom cover connected to the valve body is arranged below the groove, and a pressure relief mechanism is arranged inside the groove. The pressure relief mechanism comprises a force-receiving member, a pressure plate connected to the force-receiving member, and a first spring arranged below the pressure plate and abutting against the bottom cover. The force-receiving member comprises a flow diversion block protruding from the through hole and a connecting rod connected to the flow diversion block, and the connecting rod passes through the pressure plate and is locked and fixed by a nut.
3. A dynamic balance electric regulating valve according to claim 2, characterized in that the top end of the pressure plate is pressed against the top wall of the groove, the bottom of the pressure plate is provided with a boss, and the top end of the first spring is sleeved on the boss.
4. A dynamic balance electric control valve according to claim 1, characterized in that the valve rod is arranged through the valve cover, a sealing cover threadedly connected to the valve cover is sleeved on the valve rod, a convex ring abutting against the valve cover is arranged on the outer circumferential wall of the sealing cover, a nut cover threadedly connected to the sealing cover is arranged at the connection between the sealing cover and the valve rod, an installation groove is arranged at the connection between the nut cover and the valve rod, a plurality of O-rings adapted to the valve rod are stacked in the installation groove, and a packing gland threadedly connected to the installation groove is arranged above the O-rings.
5. A dynamic balance electric control valve according to claim 4, characterized in that a second spring is arranged between the packing gland and the O-ring.
6. A dynamic balance electric control valve according to claim 5, characterized in that a sealing ring adapted to the valve rod is arranged inside the nut cover below the installation groove.
7. A dynamic balance electric control valve according to claim 6, characterized in that the bottom of the sealing cover is provided with a thrust ring that is threadedly connected to the sealing cover and abuts against the bottom end of the valve cover.
8. A dynamic balance electric regulating valve according to claim 1, characterized in that the top surface of the elastic sleeve is higher than the top surface of the filter cover.
9. A dynamic balance electric control valve according to claim 8, characterized in that the filter cover is connected to the valve core through threads.

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Product classification of Kaiweixi

KAI WEI XI CHAN PIN FEN LEI

ZDLN Electronic Electric Double-Seated Control Valve

More Electric Control Valve>>

More control valve>>

More valve>>

ZDLN Electronic Electric Double-Seated Control Valve