Big Discount Spherical Disc Butterfly Valve - ZDL Series Automatic recirculation control valve – Convista
Big Discount Spherical Disc Butterfly Valve - ZDL Series Automatic recirculation control valve – Convista Detail:
ZDL series Auromatic recirculation valve is a kind of pump prtectiong device. It automatic protects centrifugal pump when pump body occur cavitation damage or unstable (especially conveying hot water at low load operation). Once pump flow is lower than the preseted flow, bypass can completely open to ensure the minimum required flow pump. Even running fully closed, namely running flow is zero, the minimum flow can also pass bypass for Automatic recirculation. Pressure reduced through the multistage bypass pressure reducing valve. ZDL series is suitable for bypass with medium or low pressure differential, maximum pressure differential is 6MPa, and specific choice is determined by factory. Unique L bypass can eliminated noise by made high-spped flow medium, and precent cavitation.
• Multi-cage type bypass, low noise, suitable for medium and low pressure working conditions.
• Forged valve body, can choose carbon steel or stainless steel material, etc.
• Standard bypass non-return fuction, maximum working pressure differential is 6MPa.
• With venturi port main flow non-return structure, adapt to complicated conditions.
• Pressure grade from PN16 to PN100, diameter from DN2 to DN500.
• Can select manual bypass operation function, used in fault.
Valve body type: Three-way forged body.
Nominal diameter: NPS1″-20″ (DN25, 32, 40, 50, 65, 80, 100, 200, 250, 300, 350, 400, 450, 500)
Nominal pressure: CL150#-600# (PN16, 25, 40, 64, 100)
End connection type: Flange, FF, RF, RTJ, BW, SW etc.
According to the difference of inductive main flow, main valve disc check cone of automatic recirculation valve will automatically move to a certain position. At the same time the main valve disc drive bypass valve stem, transfer the movement of main valve disc to bypass, through control bypass valve disc position, change bypass throttling area, so as to control bypass flow. When main valve disc back into valve seat closed, all flow backflow through bypass. When main valve disc to rise to top position, bypass is fully closed, all the flow of pump flow to process system. This valve set four functions in one body.
• Flow perception: Automatic recircution valve main valve disc can automatically perceive main flow of process system, thereby according to the flow to determine position of main valve disc and bypass disc.
• Recirculation control: Automatic recirculation valve can inhaled pump normal operation required minimum flow into storage device through bypass, so as to adjust pump H-Q charateristics, to realize recycling.
• Bypass multistage pressure reducing: bypass control system can reduced the backflow medium from high-pressure pump outlet to appropriate backflow to low-pressure storage device with low noise small wear.
• Check: Automatic recirculation valve also has check valve effect, preventing the liquid backflow to pump body. Bypass non-return function is optional.
• Special bypass size can be customized. The max flow rate of bypass is subject to the max Kv value.
NO | Name | Material (common used) | NO | Name | Material (common used) | ||
1 | Main Body | A105 | F304 | 13 | O ring | FKM | FKM |
2 | Guide ring | 2Cr13 | F304 | 14 | Pin1 | 2Cr13 | F304 |
3 | Main disc | 2Cr13+STL | F304+STL | 15 | Pin 2 | 2Cr13 | F304 |
4 | Lever | 2Cr13 | F304 | 16 | Stud bolt | B7 | 0Cr18Ni9Ti |
5 | Spring 1 | 60Si2Mn | 1Cr18Ni9Ti | 17 | Hex nut | 2H | 0Cr18Ni9Ti |
6 | O ring | FKM | FKM | 18 | O ring | FKM | FKM |
7 | Stud bolt | B7 | 0Cr18Ni9Ti | 19 | Control head | 2Cr13 | F304 |
8 | Hex nut | 2H | 0Cr18Ni9Ti | 20 | porous sleeve | 2Cr13 | F304 |
9 | Guide pin | 2Cr13 | F304 | 21 | Spring 2 | 60Si2Mn | 1Cr18Ni9Ti |
10 | Bonnet | 2Cr13 | F304 | 22 | End ring | 2Cr13 | F304 |
11 | Turn arm | 2Cr13 | F304 | 23 | Bypass body | A105 | F304 |
12 | Control block | 2Cr13 | F304 |
Product detail pictures:
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We insist on offering premium quality creation with very good company concept, honest product sales along with the finest and fast assistance. it will bring you not only the premium quality item and huge profit, but the most significant is to occupy the endless market for Big Discount Spherical Disc Butterfly Valve - ZDL Series Automatic recirculation control valve – Convista, The product will supply to all over the world, such as: Detroit, kazan, Uganda, With a fully integrated operation system, our company has won a good fame for our high quality goods, reasonable prices and good services. Meanwhile, we have established a strict quality management system conducted in material incoming, processing and delivery. Abiding by the principle of "Credit first and customer supremacy", we sincerely welcome clients from home and abroad to cooperate with us and advance together to create a brilliant future.
By Mabel from Ecuador - 2017.10.13 10:47
This is a very professional wholesaler, we always come to their company for procurement, good quality and cheap.
By Hedy from Southampton - 2018.05.15 10:52