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McCanna-Marpac Petro Ball Valve, E790

E790 Petro Ball Valve

Brand: McCanna-Marpac
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The MARPAC E790 ball valves employ rugged double-union ends which eliminate the space, labor and material required to install a pipe union and nipples in the piping run. 

In-line maintenance effectiveness is maximized by the seat retainer design. With this design, a rebuilt body center section can be field bench tested to verify seat integrity in both directions. 

MARPAC’s dual stem seal is a basic but important innovation that delivers better seal life and requires fewer adjustments in service. Improved operation is achieved by overall design rather than simply changing or adding materials. 

The E790 meets MSS-SP-99 criteria. Steel bodies have been burst tested to verify shell integrity.
Features
  • In-line Maintenance 
  • Double Union Ends
  • Full-Port Design
  • Integral Mounting Pad
  • Rugged Vinyl-Coated Steel Handle
  • Conical-Shaped TFE and RTFE Packing Rings
  • Dual Packing Sets
  • Standard Internal Grounding Device
  • Threaded Spacer
  • Totally Encapsulated End Seals
  • Seat Configurations — standard Petro E790 Seats include TFE, RTFE, Thermopac (carbon and glass fiber filled TFE), UHMWP and Kel-F. Standard Kel-F seated versions have an upstream RTFE seat and a downstream Kel-F seat. 

Specifications

Brand

Actuator Type

  • Electric
  • Pneumatic

Approvals & Certifications

  • UL

Approvals & Certifications

  • API 607
  • Cryogenic Testing
  • FE (Fugitive Emissions) Test
  • ISO 9001
  • Mill.1 Certificate

Ball Material

  • 316 Stainless Steel
  • Carbon Steel - Hard Chrome-Plated)

Configuration

  • Soft Seat Typical

Enclosure, Body Material

  • ASTM -A105 Carbon Steel (Manganese Phosphate Coated)
  • ASTM -A182 316 Stainless Steel

Flow Capacity

  • 5.5 to 180 Cv

Handle Assembly Material

  • Carbon Steel Plastic Coated

Materials of Construction

  • Grounding Washer: 302 Stainless Steel (non FIRE-GARD Only)
  • Stop Pin, Union End, Travel Stop & Threaded Spacer: ASTM -A105 Carbon Steel (Zinc-Plated) (Manganese Phosphate Coated)
  • Threaded Spacer: 316 Stainless Steel
  • Union End: ASTM -A182 F316L Stainless Steel

Media

  • Glycolic Water
  • Mineral Oil

Mounting Position

  • Valve Mounts in Any Position

NPT Connection

  • 1” NPT Female
  • 1/2” NPT Female
  • 1/4” NPT Female
  • 1-1/2” NPT Female
  • 1-1/4” NPT Female
  • 2” NPT Female
  • 3/4” NPT Female
  • 3/8” NPT Female

Nut & Bolt Material

  • Adjusting & Stem Nut: Carbon Steel (Zinc-Plated)

O-Ring Material

  • 90 Durometer Viton A Seal

Orifice Material

  • 316 Stainless Steel

Port

  • Full
  • Reduced

Pressure Rating

  • E790 psig: 0 to 2,500 (kPa: 0 to 17,240, bar: 172.4) with TFE, RTFE or Thermopac Seats
  • E790J High Pressure psig: 0 to 3,000 (kPa: 0 to 20,680, bar: 0 to 206.8) Using UHMWP Seats
  • E790K High Pressure psig: 0 to 4,500 (kPa: 0 to 31,030, bar: 310.3) Using Kel-F Downstream, RTFE Upstream (a Uni-Directional Valve)
  • Steam Rating psi: 427.9 (kPa: 2,950, bar: 29.5) at 134° C (273.2° F) or within P/T Curve for Superheated
  • Steam Rating: RTFE Seats, Viton Seals psig: 150 (kPa: 1,034, bar: 10.34) at 185° C (365° F) Saturated
  • Steam Rating: Thermopac-Saturated Steam psig: 350 (kPa: 2,413, bar: 24.13) at 222° C (432° F)

Ring Material

  • Gland Ring: 304 Stainless Steel
  • Gland Ring: Carbon Steel (Zinc-Plated)

Seat / Seal Material

  • Body Seal, End Seal: Buna-N
  • Body Seal, End Seal: EPR Ethylene Propylene
  • Body Seal, End Seal: Viton
  • Body Seal, Stem Seal, Spacer Seal: Flexible Graphite used on FIRE-GUARD & Themopac
  • Seat Socket: 316 Stainless Steel
  • Seat Socket: Carbon Steel (Manganese Phosphate Coated)
  • Seat, Stem Seal: RTFE Upstream
  • Seat: Kel-F Downstream
  • Seat: UHMWP
  • Stem, Body, End, Spacer Seal & Seat: TFE

Size

  • Valve: 1/4 to 2” (6 to 50 mm)

Stem Material

  • 316 Stainless Steel
  • Carbon Steel (Zinc-Plated)

Temperature Range

  • E790: -45° to 274° C (-50° to 525° F)
  • E790J & E790K High Pressure: -45° to 121° C (-50° to 250° F)
  • Minimum -29° C (-20° F) Carbon Steel & Stainless Steel with All Other Nuts
  • Minimum -46° C (-50° F) Stainless Steel with Stainless Steel Nuts

Trim Material

  • Alloy 20 or Incoloy
  • Brass
  • Carbon Steel
  • Monel
  • Stainless Steel

Union Nut Material

  • A105 Carbon Steel (Zinc-Plated)

Valve Type

  • Manual

Welded Connection

  • 1” Butt Weld End
  • 1” Socket Weld End Female
  • 1/2” Butt Weld End
  • 1/2” Socket Weld End Female
  • 1/4” Butt Weld End
  • 1/4” Socket Weld End Female
  • 1-1/2” Butt Weld End
  • 1-1/2” Socket Weld End Female
  • 1-1/4” Butt Weld End
  • 1-1/4” Socket Weld End Female
  • 2” Butt Weld End
  • 2” Socket Weld End Female
  • 3/4” Butt Weld End
  • 3/4” Socket Weld End Female
  • 3/8” Butt Weld End
  • 3/8” Socket Weld End Female

  • Industrial Paint Applications
  • Modulating
  • PLC/Computer Rooms

Documentation

Data Sheets

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