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ZDF nitrogen sealing device
ZDF nitrogen sealing device

ZDF nitrogen sealing device

The ZDF series nitrogen sealing device is a self operated micro pressure control system independently developed and researched by our company. It is mainly used to maintain a constant pressure of the protective gas (usually nitrogen) at the top of the container, in order to avoid direct contact between the materials in the container and the air, prevent material volatilization, oxidation, and ensure the safety of the container. Specially suitable for gas seal protection systems of various large storage tanks. This product has the characteristics of energy saving, sensitive operation, easy operation and maintenance. Widely used in industries such as petroleum and chemical.


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Equipment Introduction

The nitrogen sealing device is easy to set for nitrogen supply and release pressure, and can be operated under continuous production conditions. The pressure detection diaphragm has a large effective area, a small set spring stiffness, sensitive action, and stable device operation;

For the safety of the storage tank, it is necessary to install a breathing valve on the top of the tank. The breathing valve only serves a safety purpose, avoiding the defect of frequent opening and closing of the nitrogen supply valve and nitrogen release valve, which are prone to damage in conventional nitrogen sealing devices;

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Standard specifications

Type

Nitrogen Sealed Unit

Body Size

DN15-DN200(1/2-18)

Body Ratings

PN10、16、20、25、40、50、64 ANSI150#、300#

Body & Bonnet Material

WCB, CF8, CF8M, CF3, CF3M, WC1, WC6, WC9, LCB, LCC, LC3...

Packing

V-PTFE/Flexible Graphite

Gasket

GRAP+304, GRAP+316，PTFE

Connections

Welding type (SW，BW)/Flanged(RF、MFM)

Painting color

Brown paint/No painting on stainless steel valve body/ silver paint...

Pressure regulating scope (KPa)

0.1-0.3 0.2-0.35 0.3-0.5 0.4-5.5 5-15 6.5-20 10-30 15-40 25-50 40-80...(high pressure and special regulating scope shall be decided according to practical situations)

Note: The above are only standard combinations, and specifications outside of this table are also possible depending on the operating conditions.


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