What is the difference between Plan 53A and 53B?

The major difference in the plans is that Plan 53A uses an external reservoir, while Plans 53B and 53C run within a closed loop system with a make-up system piped to it for replenishment of the barrier fluid.

What is Plan 53A?

API Plan 53A utilizes a reservoir and circulates a pressurized barrier fluid between the inboard and outboard seals. The typical source of pressurization is plant nitrogen. The reservoir should be set at least 20 psi (1.3 bar) above maximum seal chamber pressure.

What is Plan 53B?

API Plan 53B circulates a pressurized barrier fluid between the inboard and outboard seals. The source of pressurization is a bladder accumulator. Plan 53B has the advantage of not allowing gas absorption into the barrier fluid which may allow for operation at higher pressures than Plan 53A.

How does 53c plan work?

Barrier fluid system pressurized by a piston accumulator supplying clean liquid for an arrangement 3 pressurized dual seal. The barrier pressure is generated from the seal chamber pressure. The system is self-energizing and reacts to fluctuations in the seal chamber fluid pressure.

What is API plan 11?

API Plan 11 recirculates flow from a high‐pressure section of the pump, typically the discharge piping, through a flow control orifice to the seal. Plan 11 is the default flush plan for most pumps. API Plan 11.

MECHANICAL SEAL PLAN#53A EXPLAIN IN HINDI API682

What is API plan 52?

API Seal Plan 52 utilizes a reservoir and circulates an unpressurized buffer fluid between the inboard and outboard seals. To provide positive circulation through the support system and into the seal, a pumping ring is employed.

What is API plan 32?

API Plan 32 delivers a clean flush fluid into the seal chamber from an external source. Typically used with a close-clearance throat bushing, this arrangement can be used to ensure a higher pressure in the seal chamber.

What is the difference between barrier fluid and buffer fluid?

When this fluid is unpressurized, it forms a buffer between the pumped fluid and atmosphere and is commonly referred to as a buffer fluid. When pressurized, it forms a barrier between the pumped fluid and atmosphere and is known as a barrier fluid.

What is API plan 23?

API Plan 23 utilizes a circulation device, typically a pumping ring, to route the fluid from the seal chamber through a cooler before returning the cooled fluid to the seal chamber. A throat bushing isolates the cooled seal chamber flush fluid from the hotter pumped liquid.

What is double mechanical seal?

A double mechanical seal is a type of mechanical seal with two primary seals or sets of faces, it can operate in various arrangements with a) a barrier (containment) between the sets of faces or b) a buffer (mixing).

How does thermosyphon work in mechanical seal?

Thermosyphon used for double mechanical seals in back to back or tandem seal arrangements. Thermosyphon provide necessary lubrication and cooling to the seal faces to increases the life of the seal. It's contains cooling coil to bring down the temperature of barrier fluid coming from seal to thermosyphon.

What is pumping ring in mechanical seal?

A pumping ring in the seal circulates the buffer fluid (pressure less than seal chamber) to the reservoir. This flush plan is very common in applications with VOCs (Volatile Organic Compounds), however if not set up similar to the schematic in Figure 8.3.

What is a seal in engineering?

A mechanical seal is a device that helps join systems or mechanisms together by preventing leakage (e.g. in a pumping system), containing pressure, or excluding contamination. The effectiveness of a seal is dependent on adhesion in the case of sealants and compression in the case of gaskets.

What are API seal plans?

These are standardized flushing piping arrangements that are widely used in the industry. Customer specific variants of these plans are possible. API Piping plans help to ensure good conditions for mechanical seal operation as well as improving safety and pump reliability.

What is seal chamber pressure?

The seal chamber pressure is a function of wear ring clearance as well as size and location of the balance holes. Two Stage Horizontal Pumps. Impeller arrangement can have two. configurations: 1.)

What is seal barrier fluid?

Halocarbon Mechanical Seal Barrier Fluids are synthetic fluorinated oils specifically formulated to lubricate and cool mechanical seal faces in rotary pumps, mixers and agitators. These fluids can be used in both pressurized and unpressurized systems that employ multiple seal arrangements (dual seal and tandem seal).

What is a barrier fluid system?

A barrier fluid system provides lubrication, cooling, and overpressure protection to ensure system integrity. From: Compression Machinery for Oil and Gas, 2019.

Why seal flushing is required?

The purpose of the maintenance procedure is to flush any debris from between the seal faces. That debris may have come from particulates in the process fluid, corrosion from aging piping, or metal from an abraded pump volute or impeller.

How many types of mechanical seals are there?

8 Types of Component Mechanical Seals.

What is seal support system?

Seal Support Systems operate to control the fluid in between and around the seal faces whether cleaning, cooling or heating the seal media or providing a separate fluid to the mechanical seal.

What are seals and types?

Why are seals used?

Seals are used primarily to authenticate documents, specifically those which carry some legal import. There are two main ways in which a seal may be attached to a document. It may be applied directly to the face of the paper or parchment (an applied seal); or it may hang loose from it (a pendent seal).

What is the function of a seal?

Prevent water, dirt and dust from entering the installation. Prevent fluids (usually oil or grease) from leaking out of the installation and ending up in the environment.

What is single seal?

A single mechanical seal consists of stationary and rotating seal faces that are made from one hard and one softer material. A single mechanical seal offers considerable cost and energy savings when used instead of gland packing.

Where double mechanical seal is used?

Double mechanical seals are commonly used in the following circumstances: If the fluid and its vapors are hazardous to the operator or environment, and MUST be contained. When aggressive media are used at high pressures or temperatures. For many polymerizing, sticky media.