Pusher Seals - QB
Product Brand
Flowserve
Type
Mechanical Seals
SubType
Pusher Seals
About this product

QB Series seals are balanced pusher seals available in single and dual seal configurations used for sealing environmentally-restricted products and meeting the most stringent regulations. The QB Series is fully compliant with API 682 Type A requirements.

... Read more Read less
  • Greater reliability and installation ease assured by rugged components, heavy duty seal faces, and cartridge seal configuration
  • Satisfies all API 682 design and qualification test requirements for single and dual arrangement seals
  • Optimal face cooling and reduced distortion with available multiport injection
  • Increased safety and environmental compliance assured by dual seal arrangement, which provides for safety backup and emissions control in hazardous services
  • Longer equipment life and reliability from design that runs cooler and is less sensitive to vapor pressure margin, even under upset conditions
  • Combat dirty services with the clog-resistant large, single coil spring in the QBS seal
  • Handle low lubricity hot water without the need for auxiliary cooling systems with the QBU seal
  • Handle vaporizing hydrocarbons with the QBQ seal
  • Handle low vapor pressure margin with the QBQ LZ seal, featuring Precision Face Topography wave pattern on the stationary seal face
  • Low to moderate pressurized barrier dual seal applications are handled by the QBB face-to-back configuration
  • Moderate and high pressure pressurized dual seal applications, including Piping Plan 53B, are handled by the QB2B back-to-back configuration
  • Choice of throttle bushing design: fixed, floating, or segmented

API 682

  • Pressure: up to 51.7 bar (750 psi)
  • Temperature: -40° to 204°C (-40°F to 400°F)
  • Speed: up to: 23 m/s (75 fps)
  • Sizes: 12.7 to 139.7 mm (0.500 to 5.500 inch)

Arrangement 1 single seal (Common Piping Plans 11, 13, 23, 32, 62)
QB
QBQ
QBS
QBU

Arrangement 2 unpressurized dual wet seal (Common Piping Plans 52)
QB/QB
QBQ/QBQ
QBQ LZ/QBQ

Arrangement 2 unpressurized dual seal with dry running backup (Common Piping Plans 72, 75, 76)
QBQ/GSL
QBQ LZ/GSL

Arrangement 3 pressurized dual wet seal (Common Piping Plans 53A, 53B, 53C, 54)
QBB/QB
QB2B/QB

Online Tools

Find Flowserve representatives near you

card-slider-icon-0
Products

Find your closest Flowserve resource for new products and replacement parts. We can help improve performance and safety throughout your operation.

Search Sales Contactsright-arrow
card-slider-icon-1
Services

Searching for a service or repair for your equipment? Connect with a nearby Quick Response Center (QRC) to resolve problems and optimize equipment.

Find Servicesright-arrow
card-slider-icon-2
Specialists

Are you looking for thought leaders with the expertise you need in your industry? We have industry and application specialists around the world who can assist you.

Locate Industry Expertsright-arrow
0/200