CÔNG TY CỔ PHẦN THƯƠNG MẠI DỊCH VỤ VÀ KỸ THUẬT WIN

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Control flow valve DH400

Model : DH400

Xuất Xứ : Liên hệ

Tình Trạng : Liên hệ

Giá Bán : Liên hệ

Bảo Hành : 12 tháng

Để có được giá tốt nhất, quý khách vui lòng liên hệ 0933.707.707 gặp Mr Lãm

MÔ TẢ SẢN PHẨM :

DH400
Pressure Sustaining Valve

Van chống va đập

Construction
• Housing with flanges to EN1092-2 drilling
• Pilot valve with integral fine regulation valve
• Control circuit with ball or gate valves on inlet and outlet
• Control circuit with fine filter Materials
• Ductile iron housing and cover plate, powder coated
• Steel diaphragm plate and disc with powder coated
• Stainless steel pressure spring and control rod
• Fibre-reinforced NBR diaphragm
• NBR and EPDM seals
• Stainless steel valve seat
• High quality synthetic material control circuits
• Brass compression fittings
• Brass pilot valve housing
• Brass filter

 Application
Pressure sustaining valves of this type are controlled by the
medium flowing through it via a pilot valve. It is installed in
supply pipework and protects downstream parts of a
system which are at risk from unacceptable excess
pressure which can, for example, be caused by pumps.
It can also be used wherever a specific inlet pressure must
not be exceeded, for example limiting the pressure in the
inlet supply network or in transition links between supply
networks and high demand large users.
If the inlet pressure to the valve rises up to the set opening
pressure, then the valve opens immediately to the
maximum flow position. If the pressure falls to the set
pressure, then the valve closes slowly to prevent pressure
shock loads.
Their compact construction makes them ideally suited for
applications where space is limited, for example in ducts.
They can be used for commercial or industrial applications
within the scope of their specification. Special Features
• High flow capacity
• High control accuracy
• Powder coated inside and outside – Powder used is
physiologically and toxicologically safe
• Integral control circuit and ball valves
• No external energy required for operation
• Replaceable valve seat Range of Application
Medium Water
Inlet pressure max. 16 bar
Opening pressure 5 – 14 bar

Technical Data
Operating temperature 0°C – 80°C
Nominal pressure PN 16
Minimum pressure 0.5 bar
Nominal size DN 50 – DN 300

Method of Operation
Under zero pressure conditions the valve is closed. If the
supply is opened, water flows into the inlet section and the
rising pressure opens the valve so that water can flow into
the outlet section. Via the fine regulation valve integrated in
the pilot valve the inlet pressure increases the pressure in
the chamber above the diaphragm. The diaphragm surface
area subjected in this way to the inlet pressure is
somewhat greater than the surface area of the valve plate
which is also subjected to the same inlet pressure, so the
diaphragm valve closes.
If the inlet pressure exceeds the set pressure of the pilot
valve, the pilot valve opens up a link between the
diaphragm chamber and the outlet side. The pressure in
the diaphragm chamber reduces and the valve opens. If
the inlet pressure falls below the set opening pressure then
the pilot valve closes and the rising inlet pressure in
chamber closes the valve.

DH400. jpg

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Công Ty Cổ Phần Thương Mại Dịch Vụ Và Kỹ Thuật WIN
Địa chỉ : 1047 Lũy Bán Bích, Phường Tân Thành, Quận Tân Phú, Thành Phố Hồ Chí Minh.
Tel : (+84) 838.490.793 - Fax : (+84) 838.490.795 - Email : sales@wincorp.com.vn - Website : www.wincorp.com.vn