hard sealing ball valves and soft sealing ball valves what are the differences between them, they are qualitative, compression performance of heat-resistant, sealing performance, the price in terms of the specific details. Today we are small make up just to bring us different detailed articles between them.

material:

hard seal for metal seated, stainless steel + carbide soft seal. Soft sealing for the seat into the fluorine plastic, rubber, resin and so on several kinds.

temperature and pressure differences: hard seat of wide use range, low temperature, high temperature, more commonly used in hard seal of high temperature and high pressure conditions. Soft seal more often used in the atmospheric temperature, atmospheric pressure low temperature condition

reveal that different grades: hard seal ball valve leakage level V commonly, also can do the VI. Soft sealing ball Industrial Valves leakage level commonly for VI

sealed performance is different: both sides of the sealing pair are metal materials or other hard materials is called & quot; Hard seal & quot; 。 This seal sealing performance is poor, but high temperature resistance, wear resistance, good mechanical performance. Such as: steel + steel; Steel + copper; Steel + graphite; Steel + alloy steel; （ The steel may also be cast iron, cast steel, alloy steel can also be surfacing welding, spraying alloy) 。 Seal on both sides of a side is the metal material, on the other side is elastic nonmetallic material called & quot; Soft seal & quot; 。 This seal sealing performance is good, but not high temperature resistant, easy to wear and poor machinery. Such as: steel + rubber; Steel + four fluorine polyethylene rotor pump, etc. The advantage is sealed performance is good, defect is easy ageing, wear and short service life. Hard seal service life is long, but the sealing is relatively worse than soft seal.

the price different, hard seal ball valve is a lot more expensive than soft sealing ball valves.

warm prompt:

soft seal is cheap, easy to achieve good sealing effect. But in the petrochemical production equipment, soft seal can only be used in the finished product loading is extremely limited, can't use other occasions, is almost useless.

the reason is simple: device within the medium particles are difficult to be, don't tell me the new device pipeline without electrode stones and other sundry, it is difficult to deal with clean, it is easy to be damage to the sealing surface.

still, often with steam purging device, because is the entire device purging, so generally can't be avoided.

this is our valve technical personnel especially want to remind you.

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