AS-CX200 Double Cartridge Mechanical Seal To Replace Flowserve X-200 Dual Cartridge Seal

AS-CX200 double cartridge mechanical seal is to replace Flowserve X-200 dual seal in cartridge form & designed as metal bellows type. It suits ANSI pumps & for standard and big bore.

Features/Benefits：
No seal setting dimensions are required.
Reasonable alignment is ensured by the setting devices that can be removed.
The welded metal bellows help users avoid shaft fretting & hang-up or clogging.

Recommended Applications:
Pumps;
Other Rotating Equipments.

About Us:

As a top-ranked mechanical seals manufacturer & supplier in China, Asinoseal can utilize metal bellows both in metal bellow seal & metal bellow type cartridge seal in an“extraordinally amazing”manner. Our metal bellow products can deal with not only normal but also critical environments. The bellow mechanical seal we make ranges from high temperature to low in order to cater to different needs. For normal application, the bellow core we built with is AM350 instead of SS316. To make short delivery possible, metal bellow seal spareparts stock is kept. The delivery time is normally 7 to 10 days.

Background Knowledge：

How many friction states between rotary face and stationary seat do mechanical seals have

Mechanical seals working in liquid media generally rely on liquid films formed between rotary faces and stationary seats by liquid media for lubrication. Therefore, maintaining liquid films between friction surfaces is essential to ensure stable operation of mechanical seal and prolong its service life.

Friction between rotary face and stationary seat of mechanical seal will appear as follows according to different conditions:
(1)Dry friction:
There is no liquid entering on sliding friction surface, so there is no liquid film but only dust and oxide layers, and adsorbed gas molecules. When rotary face and stationary seat are running, the result must be that friction surfaces are heated and wear is aggravated, resulting in leakage.

2) Boundary lubrication:
When pressure between rotary face and stationary seat increases or ability of liquid to form a liquid film on friction surfaces is poor, the liquid will be squeezed out from the gap.
Since surface is not absolutely flat, but uneven, there will be contact wear on convex points, while lubricating performance of liquid is maintained on the concave points, resulting in boundary lubrication. The degree of wear and heat generation for boundary lubrication is moderate.

(3) Semi-liquid lubrication:
There is liquid in the pit on sliding surface, and a thin liquid film is maintained between contact surfaces, so heating and wear conditions are good for this mechanical seal. Because the liquid film between rotary face and stationary seat has surface tension at its exit, Therefore, the leakage of liquid is limited.

(4) Complete liquid lubrication:
When pressure between rotary face and stationary seat is insufficient, and the gap increases and the liquid film thickens, there is no solid contact at this time, so there is no friction.
However, due to existence of large gap between rotary face and stationary seat in this case, leakage is serious thus sealing effect cannot be achieved. This situation is generally not allowed in practical applications (except for controlled membrane mechanical seals).

Most of working conditions between rotary faces and stationary seats of mechanical seals are in state of boundary lubrication and semi-liquid lubrication, while semi-liquid lubrication can obtain the most satisfactor results when the friction coefficient is the smallest, that is, the wear and heat generation are the smallest，while sealing effect is the best.