Shanghai Pudie Heavy Hammer Pressure Maintaining Butterfly Valve Series Products

NegotiableUpdate on 01/07

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Shanghai Pudie Heavy Hammer Pressure Maintaining Butterfly Valve Series Products

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Heavy hammer pressure retaining butterfly valve-Shanghai Pudie Valve Co., Ltd

1.Heavy hammer pressure retaining butterfly valveIntroduction:
The heavy hammer pressure maintaining butterfly valve is currently one of the more advanced management and control equipment both domestically and internationally. It is mainly installed at the inlet of hydroelectric power plants and used as an inlet valve for the turbine; Or installed at the outlet of water pumps in various pumping stations such as water conservancy, electricity, water supply and drainage, replacing the functions of check valves and gate valves. When working, the valve cooperates with the pipeline host, and according to the principle of hydraulic transition process, through the preset opening and closing program, effectively eliminates water hammer in the pipeline, achieves reliable shut-off of the pipeline, and plays a role in protecting the safety of the pipeline system.

The heavy hammer pressure maintaining butterfly valve produced by our company has a small retention coefficient, high degree of automation, complete functions, stable and reliable performance. It is a new generation of intelligent, efficient and energy-saving product developed by our designers based on extensive collection, research and summary of the performance of similar products at home and abroad, and the introduction of multiple research results from the valve, hydraulic, electrical and other industries. The company has strong technical strength and can independently design according to the special requirements of users, meeting the needs of a wide range of users for this product from multiple aspects.

2.Heavy hammer pressure retaining butterfly valveFeatures:

◆It can replace the functions of the original electric gate valve and check valve at the inlet of the water pump, and integrate the mechanical, electrical, and hydraulic systems into a whole, reducing the footprint and infrastructure investment.

◆The heavy hammer pressure maintaining butterfly valve is complete and can be used as an independent system for on-site debugging and control without the need for additional configuration; It can also be used as a device unit in a distributed control system (DCS), centrally managed by a central computer through I/O channels, and operated in conjunction with pumps, turbines, bypass valves, and other pipeline equipment; And equipped with manual function, it can also manually open and close valves without power supply, meeting the requirements of valve debugging and control under special working conditions.

◆Good controllability, wide adjustment range, and strong adaptability. The electro-hydraulic control system is equipped with multiple adjustment nodes, which can set the opening and closing program according to different pipeline control requirements, ensuring that the valve can automatically open and separate at a pre-set time and angle, and slowly close in two stages when the opening and closing conditions are met. And it can achieve non electric valve closing, effectively eliminate destructive water hammer, prevent the occurrence of water pump and turbine unit runaway accidents, reduce pressure fluctuations in the pipeline system, and ensure the safe and reliable operation of equipment.

◆The main valve sealing pair adopts a triple eccentric metal seal or double eccentric rubber seal structure, which is easy to open and close and reliable in sealing; And there is an additional increased eccentricity, which gives the valve good self sealing performance. The medium and small diameter butterfly plates are designed as streamlined flat plate structures, while the large diameter butterfly plate is designed with a double flat plate truss structure, resulting in small displacement and smooth water flow. The valve flow resistance coefficient is 0.1-0.6, much lower than that of the check valve (1.7-2.6), and the energy-saving effect is significant.

3.Heavy hammer pressure retaining butterfly valveBasic Parameters:

Nominal diameter DN (mm)		150~4000
Nominal pressure level PN (MPa)		0.25～4.0
Test pressure Ps(MPa)	seal	1.1×PN
	intensity	1.5×PN
Work pressure (MPa)		≤1.0×PN
Medium temperature ℃		≤80
Applicable Medium		Clear water, seawater, sediment water, oil products, etc

4.Heavy hammer pressure retaining butterfly valveSpecial parameters:

Nominal Diameter	<1000		≥1000
Valve opening time (adjustable)	10-60 seconds		20 to 120 seconds
Valve closing time (adjustable)	Quick close	1.5 to 15 seconds	2.5 to 25 seconds
Valve closing time (adjustable)	Slow off	2.5-60 seconds	6-90 seconds
Valve closing angle (adjustable)	Quick close	70 ± 10 degrees	70 ± 10 degrees
Valve closing angle (adjustable)	Slow off	20 ± 10 degrees	20 ± 10 degrees
Minimum flow resistance coefficient	0.1

4Heavy hammer pressure retaining butterfly valveProduct Structure Description

The product follows the control system◆The energy storage types are divided into two series: heavy hammer type and accumulator type. The heavy hammer control system is further divided into ordinary heavy hammer type, automatic pressure holding heavy hammer type (B), and locking type automatic pressure holding heavy hammer type (S); The accumulator type control system is divided into ordinary accumulator type (X) and lock type accumulator type (XS).

◆Valves are mainly composed of four parts: valve body, transmission mechanism, hydraulic station, and electrical control box.

◆The valve body is composed of main components such as valve body, butterfly plate, valve shaft, sliding bearing, and sealing assembly.

◆The heavy hammer type generally adopts a horizontal structure, and the valve shaft adopts a half shaft structure.

◆The accumulator type is generally arranged horizontally; Vertical layout can also be adopted according to user requirements.

◆The transmission mechanism is mainly composed of hydraulic cylinders, rocker arms, supporting wall panels (including heavy hammers, levers, locking cylinders, etc.), and other connecting and transmission components. It is the main actuator for hydraulic power to open and close valves.

◆The transmission hydraulic cylinder is equipped with a fast observation time regulating valve, a slow closing time regulating valve, and fast and slow closing angle regulating valves. The adjustment range can be found on page five under 'Special Parameters'.

◆When arranged horizontally, the transmission mechanism is generally installed in the forward direction; When limited by on-site space, reverse installation can also be used according to user requirements.The hydraulic station includes components such as oil pump unit, manual pump, accumulator, solenoid valve, relief valve, flow control valve, globe valve, hydraulic manifold block, oil tank, etc.

◆In the heavy hammer automatic pressure holding system, the accumulator is used as a compensation for system pressure.

◆In the locking type heavy hammer automatic pressure holding system, the accumulator is used for compensating the system pressure and unlocking the locking cylinder.

◆In an accumulator system, the accumulator provides the main power source for valve opening and closing.

◆The flow control valve is used to adjust the valve opening time, and the adjustment range is shown in Section 5

◆Manual pumps are used for system debugging and valve opening and closing under special operating conditions.

◆The control characteristics of the hydraulic system solenoid valve directional valve are generally positive acting type, that is, the solenoid valve opens the butterfly valve when powered on and closes the butterfly valve when powered off; On the contrary, it is a reactive type, where the solenoid valve loses power and the butterfly valve closes. The conventional matching electromagnetic directional valve is a positive acting type, and the use of a reverse acting type should be specified when ordering.

◆The hydraulic system and valves can be installed as a whole or separately. Unless otherwise specified by the user, it is a complete installation. When the accumulator is arranged vertically, it is installed separately.

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