Type 48LP John crane

O-ring Pusher seals | Low-emission, High-pressure O-ring Shaft Seal for Light Hydrocarbon Services

Type 48LP John crane

Features mechanical seal type 48hp

  • California Residents: PROPOSITION 65 WARNING
  • Low emission single seal — designed to satisfy U.S. federal, state and local regulatory requirements. Type 48 assures emission control with a single seal arrangement in VOC services. Years of low emission sealing are provided.
  • Type 48 sealing package — Type 48 seals are application-specific with the proper selection of primary ring, mating ring materials and flush arrangement.
  • Computer-optimized seal faces — computer modeling minimizes thermal and pressure caused distortion. For optimal performance, face materials are specified antimony filled carbon graphite versus silicon carbide as standard.
  • Flush maximizes cooling — available with an extended flush with single point injection and a large percentage of the mating ring exposed to the process fluid for cooler running. For higher heat loads, a distributed flush with improved heat transfer characteristics is recommended.

Recommended Applications type 48hp

  • Process pumps
  • Other rotating equipment

About Mechanical seal type 48hp

Type 48 seals evolved from the successful, proven John Crane Type 8B1 design, the preferred choice for safe, reliable, unpressurized tandem and pressurized dual seal arrangements in petroleum services for more than four decades. The Type 48 is a dependable, engineered mechanical seal developed specifically for single seal installations to attain MACT (Maximum Achievable Controllable Technology) compliance in light hydrocarbons and other VOCs (volatile organic compounds). Type 48 single seals control emissions to less than 500 ppm. Available in cartridge or optional shaft-mounted seal arrangement.

– Industrial applications involved in the processing of VOCs and similar hazardous materials

– Lubrication liquids, aqueous solutions, chemicals, light hydrocarbons and water services

Design Features mechanical seal type 48hp

Low emission single seal — Designed to satisfy U.S.A. federal, state, and local regulatory requirements. Type 48 assures emission control with a single seal arrangement in VOC services.

Years of low emission sealing are provided. Available with fixed, floating, and segmented type throttle bushings that can be suited to fit the application needs.

Type 48hp sealing package — Application-specific with the proper selection of primary ring, mating ring materials, and flush arrangement. Each seal has the built-in capability to offset the combined effects of pressure distortion, thermal distortion, and heat generation on leakage and wear. Specific seal head application is based on seal size, shaft speed, and other variables. Type 48hp Seals also can be provided in an unpressurized/pressurized dual seal.

Computer optimized seal faces — Minimizes thermal and pressure caused distortion. For optimal performance, face materials are specified antimony filled carbon graphite versus silicon
carbide as standard. For higher duty applications, the 48HP uses a special hydropadded face geometry.

O-ring drag is reduced by tighter tolerances and smoother sliding surfaces.

Flush maximizes cooling — Available with an extended flush with single point injection and a large percentage of the mating ring exposed to the process fluid for cooler running. For higher heat loads, a distributed flush with improved heat transfer characteristics is recommended.

Material mechanical seal type 48hp

  • Face/Primary Ring: Premium Carbon Graphite
  • Seat/Mating Ring: Alpha Sintered Silicon Carbide
  • Drive Collar: 316 Stainless Steel
  • Gland Plate: 316 Stainless Steel
  • Sleeve: 316 Stainless Steel
  • Retainer Disc: 316 Stainless Steel
  • Set Screws: 316 Stainless Steel
  • Snap Ring: 316 Stainless Steel
  • Spring Alloy C-276 (UNS N10276)
  • O-Ring: Fluoroelastomer

Operating range mechanical seal type 48hp

Temperature Limits

-40°F to 500°F/-40°C to 260°C

 

Pressure Limits

300 psi(g)/20.7 bar(g) process pressure

 

Speed Limits

5000fpm/25m/s

Product Description type 48hp

The Type 48hp is a dependable, engineered mechanical seal developed specifically for single seal installations to attain maximum achievable controllable technology (MACT) compliance in light hydro-carbons and other volatile organic compounds (VOCs). Type 48hp single seals control  emissions to less than 500 ppm. Available in cartridge or optional shaft-mounted seal arrangement.

• Industrial applications involved in the processing of VOCs and similar hazardous materials

• Lubrication liquids, aqueous solutions, chemicals, light hydrocarbons, and water services