SF6 gas recovery unit AGRU-4

SF6 gas recovery unit AGRU-4

This cart is ideally suited for servicing small volume SF6 equipment. All processes required for servicing SF6 equipment can be performed with this cart. The equipment is designed for the recovery, temporary storage, conditioning, and dispensing of SF6 Gas. The equipment is designed for use in field service of insulated metal clad switchgear, bus ducts and individual circuit breakers. The AGRU-4 SF6 Gas Servicing Cart shall be fully assembled on a two-wheeled heavy-duty handcart, which shall be sufficiently braced to minimize vibration. Handcart will be complete with lifting eye, hose hook and power cable storage.

Specifications

  • Storage capacity: 22,7 Kg
  • Vacuum Capacity: (with optional upgrade)
    • + 10 m3/h (60Hz – 110V) » 17 m3/h
    • + 8,5 m3/h (50Hz – 220V) » 14 m3/h
  • Evacuate pressure < 0,67 mbar
  • Weight: 225 lbs - 103 Kg
  • Dimensions: 46’’x22’’x24’’ - 1170x560x610 mm - (H x W x D)
  • Optional: Tank heater, Insulation blanket, SS tubing and hoses

Functions:

  • Recover, purify and store SF6 Gas from the switchgear to the storage tank.
  • Evacuation:
    • Service hoses < 1.33 mbar
    • SF6 Gas cart down < 0.67 mbar
    • Air and moisture from the switchgear < 0.67 mbar
  • Purify SF6 Gas by recirculating through the filter system:
    • (D1) - Dryer Filter - Contains activated alumina to aid in the drying and purification of SF6 Gas
    • (P1) - Purification Filter - Contains Molecular Sieve 13X to remove arcing by-products
    • (F1) - Particulate Filter - Will filter all particulate matter down to 0.1 micron nominal
  • Pressure regulated recharging of SF6 Gas to the switchgear from the storage tank.
  • Evacuate SF6 Gas from the cart to an external storage tank for maintenance purposes.

Features:

  • Mounted of a convenient hand cart with 10" (250mm) pneumatic tires for ease of movement
  • Very easy to operate - only two valves to switch operating modes
  • High pressure, direct-drive oil-less compressor with 1000:1 compression ratio (capable of 1000psi – 69 bar)
  • Capable of liquid SF6 storage (50lbs.@60ºF / 22.7 kgs.@15.5 ºC)
  • Purifies, dries and filters to 0.1 microns during recovery and re-pressurization
  • Filters are easily changed without disconnecting any tubing or using any special tools
  • Auxiliary connection allows for infinitely expandable storage through use of external tanks
  • Comes complete with 9.8ft / 3m hoses and power cable
  • Colour change moisture indicator to monitor moisture in gas

Applications:

  • Recover and purify SF6
  • Evacuate air and moisture prior to filling
  • Consolidate SF6 cylinders
  • Store SF6 in liquid state in onboard storage or auxiliary bottles
  • Regulated filling of SF6 equipment
  • Purification of SF6 (removes particles, moisture, and SF6 decomposition products)

AGRU-4 Specifications

Type

Portable SF6 Gas Recovery Unit

Physical specifications

21-1/2" (546 mm) Wide x 23" (585 mm) Deep x 46" (1,168 mm) // 225 lbs. (102 kgs.)

Input power

120Vac/60Hz - 220Vac/50Hz - other available configuration (choose it in the order)

SF6 Compressor

One High Pressure Single Stage Direct Drive Oil-less Compressor – up to 1,000 psig (69 bar). Motor 0.24kW, 3550 rpm. Metal valve construction.

Suction pressure regulator

One Suction pressure regulator, brass body, 0-30 psig (0-2 bar) spring

Equalization circuit

One Equalization circuit, to allow for high-pressure restarts of the compressor

Discharge check valve

One Discharge check valve, brass, prevents high pressure going back to compressor when performing a low-pressure equalization.

Condenser

One High efficiency, 4-pass, air-cooled SF6 condenser to aid in liquification of SF6 at higher ambient temperatures.

Discharge pressure

One High discharge pressure switch set to automatically shut unit down when it reaches maximum allowable pressure

Vacuum Pump

Motor: 0.37 kW, 1750 RPM, TEFC electric motor
Displacement:

  • 6 CFM - 10 m3/h (60Hz – 110V) – Optional upgrade to 10 CFM -17 m3/h
  • 5 CFM – 8.5 m3/h (50Hz – 220V) – Optional upgrade to 8.25 CFM -14 m3/h

Blank off pressure: 20 microns (0.03 mbar).
Pump also includes: positive antisuckback valve, isolation valve, gas ballast, and automatic oil return system.

Storage Tank

Volume: 1215 Cu. In. - 0.02 m3
Designed for: 500 PSIG (35 bar), 250ºF (121ºC)
According to: Fabricated and labelled to ASME Section VIII Div. 1.
High liquid level shut-off switch set to automatically shut unit down when there is 50lbs.@60ºF / 22.7 kgs.@15.5 ºC of liquid SF6 @
Tank also includes: relief valve and inlet/outlet valves.

Filters

(D1) - Dryer Filter - Contains activated alumina to aid in the drying and purification of SF6 Gas
(P1) - Purification Filter - Contains Molecular Sieve 13X to remove arcing by-products
(F1) - Particulate Filter - Will filter all particulate matter down to 0.1 micron nominal

Valves

Designed for pressure, temperature and flow. Bronze body with Teflon seats and seals, quarter turn.

Pressure Gauges

One for suction pressure (compound)
One for discharge pressure
One for regulated pressure.

Vacuum Gauge

0-30"Hg (0 to -1 bar) for vacuum system

Pressure Regulator

One Pressure Regulator, Brass body, 0-100 psig (0-6.9 bar) spring, to allow for safe regulated filling of SF6 equipment.

Hoses

Two Permeation Rubber Resistant Hoses: 1/4" (6 mm) I.D. X 10 Ft. (0.91 meter) Long, complete with quick disconnect self-sealing end fittings.
Hoses will be suitable for system pressure, temperature and flow.

AGRU-4 - Optional Upgrades and Accessories

Stainless Steel (SS) Tubing

Unit can be supplied with stainless steel tubing replacing the standard copper tubing

Stainless Steel Hoses

Unit can be supplied with stainless steel hoses replacing the standard rubber hoses

Vacuum Gauge 0-40 torr (53mbar)

High accuracy barometrically compensated vacuum gauge can be supplied with unit to measure vacuum when drying out the SF6 equipment

Storage Tank Heater

300 W storage tank heater. Heater comes with its own power cable and has a thermostat preset at 125 ºF (52 ºC) and is protected from overheating by a thermal cut-off. The heater maintains an even temperature for a constant positive pressure that speeds up the charging process.

Storage Tank Insulation Blanket

Storage tank insulation blanket can be provided to help keep the storage tank warm when performing the charging process

DN-8 Style Quick Connections

Unit can be supply with DN-8 style quick connections on equipment and hoses

Increase Hose Length

Unit can be supply with 6m. hoses instead of 3m.

AGRU-4 – Spare Parts

Filter D-1

Dryer Filter – recommended to change each 50 hours of compressor work

Filter P-1

Purification Filter – recommended to change each 50 hours of compressor work

Filter F-1

Particulate Filter – recommended to change each 50 hours of compressor work

Vacuum Pump Oil

Vacuum pump oil level has to be checked each time you turn it on. Available in two quantities: 946 ml or 3780 ml

Power linesSF6 gas recovery unit AGRU-4SF6 gas recovery unit AGRU-4

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