YQ20015-10/16/25Q Self regulating Differential Pressure Control Valve with Check Function
YQ20015-10/16/25Q Self regulating Differential Pressure Control Valve with Check Function
YQ20015-10/16/25Q Self regulating Differential Pressure Control Valve with Check Function
YQ20015-10/16/25Q Self regulating Differential Pressure Control Valve with Check Function

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YQ20015-10/16/25Q Self regulating Differential Pressure Control Valve with Check Function

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Model No. : YQ20015-10Q,16Q, 25Q
Brand Name : YQ

Product description

YQ20015-10/16/25Q Self Regulating Differential Pressure Control Valve with Check Function Product Description Working principle:  Self-regulating with check differential pressure control valve (herein referred to as differential pressure control valve), is a dynamic equilibrium hydraulic self-regulating valve which keeps valve’s upstream and downstream of set-pressure differential constant, also known as differential pressure balancing valve or differential pressure regulating valve. Such set pressure differential will not be disturbed by fluctuation of upstream pressure, and has been becoming necessary self-regulating device to maintain upstream or backwash, or between systems differential pressure dynamic equilibrium in HVAC system (see Figure 3A, 3B). When the upstream pressure is lower than set pressure differential, the main valve will automatically close; When the downstream pressure is larger than the upstream pressure, the main valve will also automatically close.  When the differential pressure control valve is installed at the outlet of pump, the differential pressure between pump inlet and outlet could be maintaining stable. It will effectively limit pumping flow rate to satisfy pump units with water supply dynamic equilibrium, and prevent them from overloading operation to protect the pump units according to the pump performance curve. As the differential pressure control valve is designed automatic check function, the main valve will automatically close upon the pump stops operating. The closing speed can preset in order to avoid water surge causing damage and protect pump from reverse working.  Differential pressure ΔP is defined as the inlet static pressure P1 minuses the outlet static pressure P2, where ΔP= P1-P2 . The differential pressure control valve has two types, one is strainer equipped and another non-strainer below the sizes of DN300( including DN300). The strainer is installed between the inlet of flange and seat, and mainly applies to the condition with flow media shall be filtered. As per the customer’s request, open indicator could be configured on the top of the main valve to determine the main valve’s opening level.    Application:   It is widely applied to the field and condition of HVAC and water supply piping system that require differential pressure dynamic equilibrium and automatic check.(Please specify on order if requiring the valve without check function.)   Complied Standards Flange end connection complies with GB/T17241. Strength and seal test comply with GB/T13927.   Main Performance Parameters   Table 1:Technical parameters                                                      

Items

YQ20015-10Q

YQ20015-16Q

YQ20015-25Q

Nominal Pressure

1.0 MPa

1.6 MPa

2.5MPa

Strength Test

1.5 MPa

2.4 MPa

3.75MPa

Seal Test

1.1 MPa

1.76 MPa

2.75MPa

DN(mm)

40~600

Suitable media (Temp.)

Water,≤80

 

ΔP Adjusting range

≤0.5MPa

                               Table 2:Main Parts List and Materials 

Parts items

Materials

Name

Description

Body, Cylinder, Cover

Ductile iron

GGG 50

Stem, Fastener

Stainless steel

1Cr18Ni9Ti

Bearing, Bush

Cast copper

ZCuAL9Mn2

Disc Seals

Rubber

NBR

Features  l   Self-regulating:Model YQ20015 differential pressure control valve is a full-automatically hydraulic control valve driven by piston through the inlet and outlet differential pressure regulating (See Fig.2), without in need of external equipped power and electrical control device. Such differential pressure changes will transmit to the very sensitive pilot valve-6, through precision spring adjustment to determine the upstream and downstream of set pressure.  l  Set pressure differential value can’t be changed by the fluctuation of pipeline pressure  l Wide range adjustment of differential pressure ΔP:The pressure differential pilot valve use a sensitive adjusting spring to withstand differential pressure and balance the fluctuation of inlet pressure. The best proper differential pressure ΔP is between 0 and 0.5MPa. Please specify on order if requesting larger adjusting range of differential pressure.  l  Automatic check function l  Improve pumping efficiency: If the valve is installed in inlet and outlet of pump, it would stabilize the pump lift in efficient operation, improve service efficiency and save cost as well.   l  .Strong anti-cavitation performance: Y-style wide chamber and “cucurbit” style body has a better anti-cavitation capability, especially applied to high differential pressure, hot water condition.   Main Dimensions                                                                                            PN: 1.0MPa,1.6 MPa, 2.5 MPa         Packaging & Shipping Polyethylene Bags---- Standart export carton----Wooden case or as per customers' requirement Shipping:Seaworthy  30 days in normal after receipt of the order. It mainly depends on quantity and types of valve  Company Information  Guangdong Yongquan Valve Technology Co.,Ltd (YQ for short) was founded in 1982 and its headquarters is based in Foshan city, Guangdong province. YQ manufactures a broad range of valve products under the “YQ” brand.These valve products are designed for use in the toughest applications such as municipal water systems; water supply and drainage systems in high-rise buildings; fire protection systems; HVAC systems, and industrial water systems. YQ also manufacture valves for use in sea water, and other applications.   So far,YQ produces over 30 series, more than 5700 types of products, and over 50 of them are patented. Patented products are available in a wide range, including pressure reducing valves, pump control valves, gate valves, and backflow preventers, etc. The gate valve has been both FM approved and UL listed. Not only does the company have its products sell nationwide, but also they are exported to oversea countries. Up till now, YQ products have been applied in more than 400 water supply companies, 100 national key projects as well as 20 overseas projects. YQ products can be found in national key projects including the Bird Nest (the national Olympic stadium), the Water Cube (the national swimming center) and the national theater, as well as Guangzhou International Convention & Exhibition Center, etc. They are also exported to other countries, such as the U.S.A., Canada and Russia etc.   The company focuses on products’ technical development. The objective of the company is “to serve our customers with revolutionary valves”. A marketing strategy of product localization and globalization will be taken into account for the company’s long term sustainable development. For requesting more information, please visit our website on http://www.yq.com.cn/.      Contact Ways   
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