API 682 Seals

API 682 SEALS & FLUSH PLANS

The Stein Seal ® Company has developed API1 STANDARD 682 seals for the oil and gas industry. Stein Seal® has designed, manufactured and tested the seals according to the rigorous API Standard 682 test protocols. In general, these are balanced seals with cartridge construction. These seals are classified in to Types, Category, Arrangements and Configurations. The seals are designed and tested to operate continuously for 25,000 hours without need for replacements.

There are three Types of seals: Type A, Type B and Type C

Type A seal is a balanced, internally-mounted, cartridge design, pusher seal with multiple springs. Secondary sealing elements are elastomeric O-rings.

Type B seal is a balanced, internally-mounted, cartridge design, metal bellows seal.  Secondary sealing elements are elastomeric O-rings.

Type C seal is a balanced, internally-mounted, cartridge design, metal bellows seal.  Secondary sealing elements are flexible graphite.

The seals are classified in to Category 1, 2 and 3

Category 1 are intended for use in non API 610 pump seal chambers, meeting the dimensional requirements of ASME B 73.1 and ASME B73.2 seal chamber dimensions and their application is limited to seal chamber temperatures from -40°F to 500°F (-40°C ~ 260°C) and gauge pressures up to 300 psi (2 MPa / 20 bar).

Category 2 are intended for use in API 610 pump seal chambers dimensional requirements. Their application is limited to seal chamber temperatures from -40°F to 750°F (-40°C ~ 400°C) and gauge pressures up to 600 psi (4 MPa / 40 bar).

Category 3 provides the most rigorously tested and documented seal design. They meet the seal chamber envelope requirements of API 610 (or equal). Their application is limited to seal chamber temperatures from -40°F to 750°F (-40°C ~ 400°C) and gauge pressures up to 600 psi (4 MPa / 40 bar).

The seals are also classified in to Arrangement 1, 2 and 3

Arrangement 1 seals having one seal per cartridge assembly.

Arrangement 2 seals having two seals per cartridge assembly, utilizing the externally supplied buffer fluid at a pressure less than the seal chamber pressure.

Arrangement 3 seals having two seals per cartridge assembly, utilizing the externally supplied barrier fluid at a pressure higher than the seal chamber pressure.

These seals are further classified in to face-to-back, back-to-back and face-to-face configuration and its definitions are given below:

Face-to-back configuration – These seal are Arrangement 2 or 3 seals.  In which one stationary face is mounted between two flexible rotary unit or one flexible rotary unit between two stationary face. The inner seal is OD pressurized by process fluid and barrier or buffer fluid is on the ID of the inner seal.  The outer seal OD pressurized by barrier or buffer fluid.

Back-to-back configuration – These seal are Arrangement 2 or 3 seals.  In which both the rotary faces are mounted between two stationary flexible units. The pumping fluid is on the ID of the inner seal, and the barrier (pressurized) or buffer (un pressurized) fluid is on the OD of the inner and outer seal.

Face-to-face configuration – These seal are Arrangement 2 or 3 seals.  In which both the rotary faces are mounted between two flexible stationary units. The pumping fluid is on the ID of the inner seal, and the barrier (pressurized) or buffer (un pressurized) fluid is on the OD of the inner and outer seal.

FEATURES:

Ø    Seal designs are fully compliant to API Standard 682 design guidelines and test protocols.

Ø      Precise control of seal face tolerances provides superior performance such as low leakage, less heat generation and longer life.

Ø     Modular cartridge design for quick installation and precise shaft alignment.

Ø      Seals fit in most popular pump seal housings.

Ø      Seals are pressure balanced to extend operating range including pressure reversals up to 40 psi (2.75 bar).

Ø     High performance premium grades of carbon and carbide faces are used in all designs.

Ø      Seals are available for shaft sizes ranging from 1 inch (25mm) to 5 inch (127mm) in .125 inch (3mm) increments.

Ø     Seal sizes over 5 inches (127 mm) are designed and supplied as Custom Engineered Seal to meet the customer requirements.

API-682 FLUSH (PIPING) PLANS

A seal piping plan is designed, manufactured and supplied to improve the environment around the mechanical seal and therefore increase the performance and reliability of the seal. Piping plans range from very simple systems such as fluid recirculation into the seal chamber to complex systems which provide pressurization, cooling and circulation for support fluids and gases. The basic operation of the piping plan and also the requirements for instrumentation are followed as per API Standard 682 guidelines. Major piping plans supplied by Stein Seal ® are Plan-21, Plan-23, Plan-32, Plan-52, Plan-53A, Plan-53B & Plan-53C.

Our API 682 seal design features, manufacturing capabilities and test facilities are witnessed and certified by a third party international certification organization. API 682 product offerings and capabilities can be found on our website www.steinseal.in

1 – American Petroleum Institute

Phone:

+1 215-256-0201

Locations:

1500 Industrial

Boulevard | Kulpsville,

PA 19443-0316

Email:

Email: YourTeam@SteinSeal.com

Stein Seal Company
P.O. Box 316
1500 Industrial Blvd.
Kulpsville, PA 19443-0316 U.S.A.