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STEIN-CERTIFIED API MECHANICAL SEALS

Stein Seal and API Standard 682

The American Petroleum Institute (API) specifies technical standards for industrial components used in the discovery, extraction and processing of oil and natural gas. API Standard 682 is the institute’s comprehensive guide for creating seals and the flush/piping plans that support them. Following 682 protocol assures the reliability of shaft seals for centrifugal and rotary pumps used in Oil & Gas.

API 682 Seals

Stein Seal designs, manufactures and tests its mechanical seals for Oil & Gas to API Standard 682 protocols. In general, API 682 applies to balanced seals with cartridge construction. Each seal is classified as one of three Types. Each type can be broken down into three Arrangements, each of which has three Configurations.

Our API seals are engineered and tested to ensure thousands of hours of continuous operation without requiring replacement.

API 682 SEAL FEATURES:

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

Precise control of seal face tolerances delivers superior performance, including low leakage, reduced heat generation and longer seal life.

Modular cartridge design facilitates quick installation and precise shaft alignment.

Seals fit in a majority of popular pump seal housings.

For extended operating range, seals are pressure balanced, including pressure reversals up to 40 psi (2.75 bar).

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

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

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

Set Operating Conditions:

Operating ConditionsType AType BType C
MediaPetroleum, Chemical solvents, Weak medium acids, water, Oil & alkali, etc.Hydrocarbon, Heat transfer fluidHydrocarbon, Heat transfer fluid
PressureUp to 610psig (42bar-g)≤ 290psi-g (20bar-g)≤ 290psi-g (20bar-g)
Temperature-104°F ~ 482°F
(-40°C ~ 250°C)
-104°F ~ 482°F
(-40°C ~ 250°C)
-167°F ~ 797°F
(-75°C ~ 425°C)
Speed≤ 82 ft/sec (25 m/s)≤ 82 ft/sec (25 m/s)≤ 151 ft/sec (46 m/s)

Materials of Construction:

MaterialsType AType BType C
Hardware316 SS, Alloy C-276316 SS, Alloy C-276, Carpenter 42316 SS, Alloy C-276, Carpenter 42
Bellows / Spring HardwareAlloy C-276 / 316 SSInconel 718, Alloy C-276Inconel 718, Alloy C-276
Rotating faceBRCG, Antimony Carbon, RBSiC, SSiCBRCG, Antimony Carbon, RBSiC, SSiCRBSiC, SSiC
Stationary faceRBSiC, SSiCRBSiC, SSiCBRCG, Antimony Carbon, RBSiC, SSiC
ElastomersFKM, FFKM, NitrileFKM, FFKM, NitrileFKM, FFKM, Nitrile

FEATURES:

  • Seal designs are fully compliant to API Standard 682 design guidelines and test protocols.
  • Precise control of seal face tolerances provides superior performance such as low leakage, less heat generation and longer life.
  • Modular cartridge design for quick installation and precise shaft alignment.
  • Seals fit in most popular pump seal housings.
  • Seals are pressure balanced to extend operating range including pressure reversals up to 40 psi (2.75 bar).
  • High performance premium grades of carbon and carbide faces are used in all designs.
  • Seals are available for shaft sizes ranging from 1 inch (25mm) to 5 inch (127mm) in .125 inch (3mm) increments.
  • Seal sizes over 5 inches (127 mm) are designed and supplied as Custom Engineered Seal to meet the customer requirements.

API 682 Piping Plans

In addition to providing specs and requirements for the seals themselves, Standard 682 includes a comprehensive section on the flushing, or piping, plans for integrating the seal into the mechanical process. The fourth and most current edition of Standard 682 features 32 basic piping configurations, each of which has the possibility of multiple variations.

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.

API 682 Testing and Compliance at Stein.

Stein piping plans and accompanying instrumentation specifications are all designed to comply with API Standard 682 guidelines. Our manufacturing capabilities, facilities, and testing protocols are all inspected and certified by a third-party international certification organization. 

Major API 682 piping plans supplied by Stein Seal include: Plan-21, Plan-23, Plan-32, Plan-52, Plan-53A, Plan-53B & Plan-53C.