The mechanical type of stainless steel drain valve, also known as the float type, utilizes the density difference between condensed water and steam. By changing the liquid level of condensed water, the float lifts and drives the valve disc to open or close, achieving the purpose of blocking steam and draining water. Mechanical drain valves have low undercooling and are not affected by working pressure and temperature changes. They discharge water as soon as there is water, and there is no water stored in the heating equipment, which can achieve heat exchange efficiency. The back pressure rate is 80%.

Mechanical stainless steel drain valves include free floating ball, free semi floating ball, lever floating ball, inverted bucket, etc.

What are the types of stainless steel drain valves

The structure of the free floating ball drain valve is simple, with only one movable component finely ground stainless steel hollow floating ball inside. It is both a float and an opening and closing component, with no vulnerable parts and a long service life, The YQ drain valve is equipped with a Y series automatic air exhaust device inside, which is very sensitive and can automatically exhaust air, with high working quality.

When the equipment first starts working, the air inside the pipeline is discharged through the Y-series automatic air exhaust device, and low-temperature condensate enters the drain valve. The liquid level of the condensate rises, the float rises, the valve opens, and the condensate is quickly discharged. Steam quickly enters the equipment, and the equipment heats up quickly, The temperature sensitive liquid of the Y series automatic air exhaust device expands, and the automatic air exhaust device is turned off. The drain valve starts working normally, and the float rises and falls with the condensate level, blocking steam and draining water. The valve seat of the free floating ball drain valve is always below the liquid level, forming a water seal with no steam leakage and good energy-saving effect* Small working pressure of 0.01Mpa, not affected by temperature and working pressure fluctuations within the range of 0.01Mpa to ≤ working pressure, continuous drainage. It can discharge condensate at saturated temperature, with a low undercooling of 0 ℃, and there is no water in the heating equipment, which can achieve optimal heat exchange efficiency. With a back pressure rate greater than 85%, it is one of the ideal drain valves for production process heating equipment.

The free floating ball drain valve is suitable for any working condition that does not wish to accumulate liquid, especially suitable for drum dryers (with siphon structure) in the paper and printing and dyeing industries. It is widely installed in various medium and low pressure heat exchange equipment in chemical units, with a pressure range of 0-4.0 MPa and a discharge capacity range of 0-9 t/h.