Support systems

Description

In addition to the wide offer of mechanical seals offered by ANGA, the company also supplies our customers with auxiliary systems, without which it would not be possible for many seals to work under certain conditions.
Currently, striving to meet the expectations of our Clients, we offer mainly auxiliary systems in accordance with four schemes described in accordance with the API 682 standard:

  • Scheme 23
  • Scheme 52
  • Scheme 53A
  • Scheme 74

Of course, that at the request of the Client are also available ancillary systems fitted to any of the other schemes API. Systems, as well as their constituent elements are selected individually in accordance with customer requirements and process specifics compacted.

SCHEME 23

According to Scheme 23, a cooler for the working fluid circulating in the pump oil seal, as well as the corresponding fittings and pipes, into the system. Forced recirculation is carried out by means of a pump ring in the stuffing box. The fluid flows through the cooler and back to the stuffing box. An external circulation system with cooling water is connected to the coil inside the cooler. This system is used when working with liquids with high temperatures.

More information on Scheme 23 can be found in the Technique section of the API Schemes page.

 

 

 

EXAMPLE OF APPLICATION

Application: single seal, eg. BC, BD.

SCHEME 52

This system is characterized by a pressureless supply of the buffer fluid, it includes a reservoir for the buffer fluid, the necessary fittings and valves, as well as instrumentation. The system is connected to a double seal. During normal operation, the circulation of the drilling fluid is forced and maintained through the inner pump ring of the seal. The reservoir, as a rule, is deaerated continuously into the gas recovery system, and the prevailing pressure in it is less than in the stuffing box. This system finds its application when working with liquids that crystallize on contact with air, hazardous to the environment, etc. The main functions of the drilling fluid are, among others, to lubricate and cool the seal and flush the sealed fluid out of the seal cavities.

More information on Scheme 52 can be found in the Technique section of the API Schemes page.

EXAMPLE OF APPLICATION

Legend:

1 – Tank with a cooler,
2 – Measuring unit of pressure and temperature,
3 – Liquid level indicator,
4 – De-airing valve

A – Mechanical seal

Application: double seals, eg. USP, BED, BPD, BUV, EPD.

SCHEME 53A

This system provides for a pressurized barrier fluid installation, which includes a barrier fluid reservoir, a hand pump for replenishing the barrier fluid, necessary fittings and valves, and instrumentation. The installation is connected to a double seal. During normal operation, the circulation of the drilling fluid is forced and maintained through the inner pump ring of the seal. A higher pressure prevails in the reservoir than in the stuffing box chamber, thus the seal in the middle is completely hermetically sealed, and therefore only small amounts of barrier liquid enter the product and into the atmosphere. The pressure of the barrier liquid in the reservoir is maintained by connecting to an external pressure source, for example. compressed nitrogen from a plant-wide system or from a cylinder. This installation is used to work with contaminated liquids that crystallize during contact with air, hazardous to the environment, toxic, etc. The main functions of the drilling fluid are, among others, to lubricate and cool the seal and flush the sealed fluid out of the seal cavities.

 

APPLICATION EXAMPLE

Legend:

1 – Tank with a cooler,
2 – Measuring unit of pressure and temperature,
3 – Pressure drop indicator,
4 – Hand pump.

A – Mechanical seal
B – Connecting an external gas source

Application: double seals, eg. USP, BED, BPD, BUV, EPD, VD, M2 / M2L, M3 / M3L, M4 / M4L.

SCHEME 74


With gate gas installation operating in accordance with Scheme 74 is composed of the feed assembly equipped with the appropriate valves and fittings, and – instrumentation. This installation is used when double gas-dynamic seals are used. The externally supplied barrier gas ensures contactless operation of the seal and also prevents leakage of the pumped liquid. Barrier gas pressure higher than the pressure of the fluid.

 

APPLICATION EXAMPLE

Legend:

1.1 – a valve that cuts off the gas supply to the unit
1.2 – cut-off valve
2 – a pressure reducing valve with a fine filter
3 – low range rotameter
4 – narrow range rotameter
5 – pressure gauge for measuring gas pressure at the outlet of the unit
6 – return valve
7 – pneumo-electric relay

Connection designation:
A – gas inlet to the unit from a compressed gas source
B – gas outlet from the seal assembly

Application: double gas dynamic seals, eg. GF, GK.

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