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KAI WEI XI CHAN PIN FEN LEI

ZJHY Pneumatic Tank Bottom Drain Control Valve
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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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ZJHY Pneumatic Tank Bottom Drain Control Valve

Model：ZJHY-16P/ZJHY-25P/ZJHY-40P/ZJHY-64P
Specification：DN25~150
Temperature：-30～450℃
Medium：Discharge for reaction tanks and kettles with viscous or easy-to-coke media

Pressure：PN1.6～6.4MPa
Connection method：Flange
Driving method：Pneumatic
Material：Stainless steel

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ZJHY Pneumatic Tank Bottom Drain Control ValveOverview

The ZJHY pneumatic tank bottom discharge control valve is an industrial automation execution unit specifically designed for installation at the bottom of reactors, storage tanks, and various vessels for media discharge, unloading, and precise flow regulation. Integrating a high-performance multi-spring pneumatic diaphragm actuator with a specialized tank-bottom valve body, its core design objective is the complete elimination of dead zones at the vessel outlet. By receiving standard 4-20mA signals from control systems, the actuator drives the stem to move the plug (available in either disc-upward opening into the tank or disc-downward opening into the valve) to achieve accurate proportional control. Since the seat is flush with the inner wall when closed, this valve is ideal for harsh process environments involving coking, high viscosity, and solid particles in the petrochemical, pharmaceutical, and food industries.

Product Image of ZJHY Pneumatic Tank Bottom Drain Control Valve

ZJHY Pneumatic Tank Bottom Drain Control ValveCharacteristic

1.Total elimination of discharge dead space:The body structure is optimized for bottom mounting, ensuring the disc remains virtually flush with the vessel's inner bottom wall in the closed position. This fundamentally prevents media accumulation, coking, or crystallization at the outlet.
2.Superior self-cleaning and erosion resistance:The streamlined flow path with a high discharge slope minimizes resistance. Upon opening, the powerful flush formed by the vessel's static pressure automatically cleans the sealing surfaces, preventing material buildup.
3.Precision pneumatic proportional control:Equipped with a compact multi-spring pneumatic actuator providing high thrust and sensitivity. Paired with a smart positioner, it offers excellent linear or equal percentage flow characteristics for stable process parameters.
4.Intrinsic safety and fail-safe protection:Driven by compressed air, it possesses natural explosion-proof attributes. Fail-safe modes (air-to-open or air-to-close) can be configured to ensure the valve resets to a safe position upon power air supply failure.
5.High temperature and pressure structural strength:Bodies are manufactured from premium cast steel, stainless steel, or corrosion-resistant alloys. Sealing surfaces are reinforced with Stellite hard-facing, ensuring long service life under high-pressure thermal cycles.
6.Vacuum and tight-seal performance:Precision-ground sealing pairs combined with high-performance packing maintain bubble-tight shut-off under high vacuum or high pressure differentials. The back-seat design protects packing from direct media contact.
7.Compact and lightweight layout:The integrated design significantly reduces installation height and weight, facilitating compact arrangements in the narrow spaces under reactors and reducing the load on vessel interfaces.
8.Modular maintenance and durability:Internals adopt a modular layout. During maintenance, the actuator and plug assembly can be extracted vertically by loosening the bonnet bolts, allowing online inspection without removing the entire valve body.

ZJHY Pneumatic Tank Bottom Drain Control Valvestructure principle

Structural Drawing of ZJHY Pneumatic Tank Bottom Drain Control Valve

List of Component Names and Materials

Part Name	Material
Body	Stainless steel
Plug	0Cr18Ni12Mo2, Stellite surface welding
Seat	PTFE (Polytetrafluoroethylene)
Stem, Push Rod	2Cr13, 1Cr18Ni9Ti
Diaphragm	Nitrile rubber reinforced with polyester fabric
Diaphragm Cover	A3
Spring	60Si2Mn
Packing	PTFE, Flexible graphite, Stainless steel bellows
Gasket	Rubber asbestos board, 1Cr18Ni9Ti, Graphite spiral wound gasket

ZJHY Pneumatic Tank Bottom Drain 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	-30～+450				℃

ZJHY Pneumatic Tank Bottom Drain 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 ZJHY Pneumatic Tank Bottom Drain Control Valve

Outline dimension table

Nominal Diameter DN(MM)	25	40	50	65	80	100	150
Seat Diameter dN(mm)	40	50	80	80	100	150	200
Rated Flow Coefficient Kv	14	35	55	95	135	220	720
Rated Stroke (mm)	25		40		50		75
Signal Range Pr(KPa)	20~100、40~200、80~240、Split range: 20~60、60~100

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

ZJHY Pneumatic Tank Bottom Drain Control Valve

More Pneumatic Control Valve>>

More control valve>>

More valve>>

ZJHY Pneumatic Tank Bottom Drain Control Valve