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KAI WEI XI CHAN PIN FEN LEI

ZAZN Electric Straight-through Double-seated Regulating 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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ZAZN Electric Straight-through Double-seated Regulating Valve

Model：ZAZN-16C/ZAZN-25C/ZAZN-40C/ZAZN-64C/ZAZN-16P/ZAZN-25P/ZAZN-40P/ZAZN-64P//ZAZN-16R/ZAZN-25R/ZAZN-40R/ZAZN-64R
Specification：DN20-DN300
Temperature：-60℃-450℃
Medium：Common fluids, thermal media, oil media, chemical media

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

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ZAZN Electric Straight-through Double-seated Regulating ValveOverview

ZAZN electric straight-through double-seated regulating valve is an industrial automation control valve composed of a linear electric actuator and a straight-through double-seated balanced valve body. By receiving standard analog signals (4-20mA DC or 0-10V DC) from control systems such as PLC or DCS, the valve accurately converts electrical energy into axial thrust. This thrust drives the valve stem, moving the upper and lower valve plugs relative to the seats. Due to the double-plug structure, the forces acting on the upper and lower plugs from the medium are opposite in direction and similar in magnitude, allowing most of the unbalanced force to be offset. Consequently, this valve features a large allowable pressure differential, high flow capacity, and excellent vibration resistance, making it particularly suitable for industrial process control systems with high flow rates, high pressure drops, and relatively relaxed leakage requirements.

Product Image of ZAZN Electric Straight-through Double-seated Regulating Valve

ZAZN Electric Straight-through Double-seated Regulating ValveCharacteristic

1.Excellent force balance characteristics:The dual-seat plug design utilizes the opposing thrust generated by the fluid on the upper and lower plugs to balance the forces, significantly reducing the output thrust required from the actuator. Under the same configuration, its allowable working pressure differential is much higher than that of a single-seated regulating valve.
2.High flow capacity:The valve body features a dual-channel flow path design. For the same nominal diameter, its rated flow coefficient (Kv value) is larger than that of a single-seated valve, allowing it to handle high-flow conditions more effectively.
3.Strong dynamic stability:Due to the low unbalanced force, the valve plug experiences minimal fluid disturbance during operation, effectively suppressing vibration and whistling during opening or regulation for smoother performance.
4.Integrated intelligent drive:Equipped with a high-performance electric actuator with an integrated electronic servo control system. It supports features such as fail-in-place upon signal loss, stroke limiting, and thermal overload protection, requiring no external air supply and offering simple wiring and easy maintenance.
5.Precise regulation characteristics:The valve plug profile is precisely calculated and machined to provide various flow characteristic options, such as equal percentage or linear, ensuring the control loop maintains high linearity and repeatability even under high load fluctuations.
6.Wide environmental adaptability:Valve body materials are available in cast iron (HT200), cast steel (WCB), and stainless steel (CF8/CF8M). The actuator has a high protection rating, making it suitable for harsh industrial sites such as outdoor, high-temperature, or humid environments.
7.Self-locking and fail-safe protection:The electric drive mechanism possesses natural mechanical self-locking characteristics, maintaining the current valve position instantly upon power failure to ensure process continuity and safety.
8.Mature and reliable structure:Adopts a classic guiding structure with excellent component interchangeability. Different valve bonnets, such as standard, extended (radiator type), or bellows-sealed types, can be selected according to the medium temperature to meet diverse needs.

ZAZN Electric Straight-through Double-seated Regulating Valvestructure principle

Structural Drawing of ZAZN Electric Straight-through Double-seated Regulating Valve

List of Component Names and Materials

Name	Material
Valve body	Cast Steel,Stainless Steel,Duplex Stainless Steel
Valve cover	HT200, ZG230-450, ZG1Cr18Ni9Ti
Valve core	1Cr18Ni9Ti, Stellite alloy surfacing
Valve seat	1Cr18Ni9Ti, Stellite alloy surfacing
Ball stem	2Cr13, 1Cr18Ni9Ti
Valve stem	2Cr13, 1Cr18Ni9Ti
Packing	V-type PTFE, flexible graphite
Gasket	Rubber asbestos board, 1Cr18Ni9Ti, graphite spiral wound gasket
Bushing	2Cr13

ZAZN Electric Straight-through Double-seated Regulating 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	-60-450				℃

ZAZN Electric Straight-through Double-seated Regulating 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 ZAZN 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	190	190	210	230	255	285	310	355	425	460	560	690	785
	PN64	190	205	220	240	265	295	325	370	440	475	570	752	819
Standard BonnetH1	Single Seat	742	777	789	812	812	962	893	991	1125	1141	1125	1487	1540
Standard BonnetH1	Double Seat		787	793	832	842	987	1017	1041	1175	1191	1279	1602	1640
Medium Temp Type	Single Seat	838	860	872	894	948	1117	1138	1146	1308	1324	1411	1630	1720
Standard BonnetH1	Double Seat		869	874	915	948	1142	1172	1196	1358	1378	1462	1750	1820
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
B		460					530			630
Flange Standards		GB：1.6、2.5、4.0、6.4Mpa ANSI：150、300、600Lb JIS：10K、20K、30K

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

ZAZN Electric Straight-through Double-seated Regulating Valve

More Electric Control Valve>>

More control valve>>

More valve>>

ZAZN Electric Straight-through Double-seated Regulating Valve