Gland packing VS Mechanical seal

Although mechanical seals had been around several|for several} decades and currently it replaced secretor packing in much application. But still, secretor packing’s area unit employed in several applications like fireplace water pumps, effluent water pumps, valve packing’s, etc,

The major comparison between the mechanical seal and secretor packing area unit listed below. They are

• Emission
• Product loss
• Power Consumption
• Installation Time

Emission

Today, emissions norms altogether countries area unit a lot of tight and move toward the target of Zero emission.

Because of the emission norms, the mechanical seals’ area unit accustomed to meet the necessity and begins commutation secretor packing.

As per the Clean Air Act of u. s., they’re 187 air pollutants listed and also the supply from that they came. each year this list continues growing. thanks to this Act, the businesses within u. s. area unit viscidly following the Clean Air Act. equally the Clean air act of global organization and developing countries like the Republic of India, Brazil area unit moving toward tight.

As per API 682, secured the outpouring rate mechanical seal are going to be as follows

• Vapors – but one thousand ml/m3 (1000 ppm vol) per try of seal faces
• Liquid – but five.6 g/h per try of seal faces

In particle, most of the mechanical seal outpouring rate is well below the suggested by API 682.

If the on top of mention emission level is over the native emission norms than we’d like to travel for the double mechanical seal.

Gland packings area unit used for less than once the pumping liquid is non-hazardous like water transfer pumps, stormwater pumps, etc.,

Product Loss

This is one of the most important parameters for choosing a mechanical seal over the secretor packing. By exploitation mechanical seal the loss of product thanks to outpouring in reduced over 99.95% when put next with secretor packing.

As per the secretor packing thumb rule, an outpouring of pumping fluid is crucial for extending the lifetime of secretor packing.

The outpouring rate of well tighten secretor packing is ten drops/minutes (but in actual website condition it’ll terribly high). Total outpouring rate for per day shall be

(10 drops/min) x sixty x twenty four = 14400 drops (approximately zero.72 liters)

As per the on top of estimation, by exploitation secretor packing the assembly loss is going to be zero.72 liters. If you think about the pump is running for one year, then the merchandise loss is going to be

0.72 x 365 = 262.8 liters

In the case of mechanical seal (assuming single mechanical seal) the merchandise loss is going to be less than one liters for a year.

Power Consumption

The amount of power needed to drive a mechanical seal is extremely less compared to the pump having secretor packing.

In the case of secretor Packing, the waterproofing can come about by pressing the secretor packing against the gap between the casing and shaft to manage the outpouring.

Also, the quantity of packing needed for the seal is pend on the chamber pressure and depth of the chamber. Usually, the quantity of packing rings used for the pumps is going to be between three to seven packing rings. Usually, the ability can increase with a rise within the variety of packing rings.

On the opposite hand, the mechanical seal having a primary seal faces that area unit having terribly fewer resistance losses. thanks to this mechanical seal can consume eightieth power (assuming mechanical seal with pumping ring) but the secretor packing.

Installation time

The Installation time for mechanical seal sometimes takes seven to eight hours (include flushing system). ordinarily, the installation length can rely upon the dimensions of the mechanical seal.

On the opposite hand, glad packing installation can take most of 1 to 2 hours and it’ll rely upon the dimensions of shaft and variety of secretor packing rings needed.