SF6 recovery equipment AGRU-4

SF6 recovery equipment AGRU-4

This SF6 recovery unit is specially designed to serve small volume SF6 equipment. With this unit you can perform all the processes necessary for SF6 maintenance. The equipment is designed to recover, temporarily store, condition and provide SF6 gas. The equipment is designed for field use in insulated metal-clad switches, bus ducts and individual switches. The AGRU-4 SF6 Gas Handling Equipment is fully assembled on two heavy duty wheels, which are sufficiently reinforced to minimize vibrations. The trolley is completed with an eyebolt, hose with hook and power cable.

Features

• Storage capacity: 22.7 kg
• Vacuum capacity: (optional upgrade)
• • 10 m3/h (60Hz - 110V) → 17 m3/h
• • 8,5 m3/h (50Hz - 220V) → 14 m3/h
• Evacuation pressure < 0.67 mbar
• Weight: 225 lbs - 103 Kg
• Dimensions: 46''x22''x24'' - 1170x560x610 mm - (H x W x L)
• Optional:
• • Heater and/or Insulating blanket for tank
• • Stainless steel pipes and hoses

Functions:

• SF6 gas recovery, purification and storage from the breaker to the storage tank

Evacuation:

• Hoses < 1.33 mbar
• Handling trolley SF6 < 0.67 mbar
• Air and humidity of the switch < 0.67 mbar
• Purification of the SF6 gas is achieved by recirculating it through the filter system:
• (D1) - Dry Filter - Contains activated alumina to aid in the drying and purification of SF6
• (P1) - Purification Filter - Contains a 13x molecular sieve to remove arches from the product
• (F1) - Particle Filter - Will filter out all material particles below 0.1µm
• Recharge pressure of SF6 gas from storage tank to regulated switch
• Evacuation of SF6 gas from handling equipment to an external storage tank for maintenance purposes

Characteristics:

• Mounted on a cart with 250mm (10" ) tires for easy movement
• Very easy to handle - only two valves to change and operate in the different modes
• High pressure, oil-free, directly controlled compressor with a 1000:1 compression ratio (capable of 1000psi - 69 bar)
• Capable of storing liquefied SF6 gas (50lbs.@60ºF / 22.7 kgs.@15.5 ºC)
• Purifies, dries and filters down to 0.1 µm during recovery and re-pressurization
• Easy filter replacement without disconnecting any tubes or using any special tools
• Auxiliary connections allow storage of infinite amounts of gas using external tanks
• Includes 9.8ft / 3m hose and power cord
• Moisture indicator changes color to indicate gas humidity

Applications:

• Recover and purify SF6
• Evacuate air and moisture before refilling
• Can be used with SF6 cylinders
• Storage of SF6 in liquid form in the storage tank or in auxiliary bottles
• Regulated SF6 filling
• SF6 purification (removal of particles, moisture and products from SF6 decomposition).

AGRU-4 Specifications

Type

Portable SF6 Gas Recovery Unit

Physical specifications

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

Food

120Vac/60Hz - 220Vac/50Hz - other configurations available (choose when ordering)

SF6 Compressor

A single stage, oil-free, high pressure compressor with direct drive - up to 1,000 psig (69 bar). Motor 0.24kW, 3550 rpm. Metal valve

Suction pressure regulator

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

Equalization circuit

An equalisation circuit, allows the compressor to be restarted by high pressure

Check valve

A brass check valve prevents high pressures from returning to the compressor when operating at low equalization pressures

Condenser

A high-efficiency, 4-step, ventilated SF6 condenser assists in the liquefaction of SF6 for high ambient temperatures

Discharge pressure

A discharge pressure switch automatically cuts off when the maximum permissible pressure is reached.

Vacuum pump

Engine: 0.37 kW, 1750 RPM, TEFC electric motor

Displacement:

Sealing pressure: 20 µmHg (0.03 mbar)

Pump also includes: check

Storage tank

Volume: 1215 cubic inches. - 0.02 m3

Designed for: 500 PSIG (35 bar), 250ºF (121ºC)

In accordance with: Manufactured and labelled for ASME section VIII Div. 1

High liquid level circuit breaker when 50lbs.@60ºF / 22.7 kgs.@15.5 ºC

The tank also includes: relief valves and inlet/outlet valves

Filters

(D1) - Dry Filter - Contains activated alumina to aid in the drying and purification of SF6

(P1) - Purification Filter - Contains a 13x molecular sieve to remove arches from the product

(F1) - Particle Filter - Will filter out all material particles below 0.1µm

Valves

Designed for pressure, temperature and flow. Teflon sealed bronze body, quarter turn

Pressure gauges

One for suction pressure (composite)

One for the discharge pressure

One for pressure regulation

Vacuum gauge

0-30"Hg (0 -1 bar) for Vacuum System

Pressure regulator

A pressure regulator, brass body, 0-100 psig (0-6.9 bar) spring, allows safe regulated filling of SF6

Hoses

Two heavy-duty rubber hoses: 1/4" (6 mm) ID X 10 Ft (0.91 m) Long, complete with self-sealing quick-connect fittings

Hoses are suitable for system pressure, temperature and flow

AGRU-4 Upgrades and Optional Accessories

Stainless steel pipe

Unit can be supplied with stainless steel pipe instead of standard copper pipe

Stainless steel hoses

Unit can be supplied with stainless steel hoses instead of rubber hoses

Vacuum gauge - 40 torr (53mbar)

A high precision barometric vacuum gauge can be supplied with the unit to measure the vacuum when the equipment is drying

Storage tank heater

300 W storage tank heater. Heater comes with its own power cord and a thermostat pre-set at 125°F (52°C) and is protected from overheating by a temperature cut-off. The heater maintains a uniform temperature for a constant positive pressure, allowing the filling process to be accelerated

Insulating blanket for the storage tank

The storage tank insulation blanket helps keep the storage tank warm which will improve the filling process

DN-8 style connections

Unit can be supplied with DN-8 style connections on both the equipment and the hoses

Increased hose length

Unit can be supplied with 6m of hose instead of 3m

AGRU-4 Consumables

Filter D-1

Dry filter - recommended to be changed every 50 hours of compressor operation

Filter P-1

Filter Purification - recommended to be changed every 50 hours of compressor operation

Filter F-1

Particle filter - recommended to be changed every 50 hours of compressor operation

Vacuum pump oil

The oil in the vacuum pump has to be checked every time it is switched on. Available in two sizes: 946 ml or 3780 ml