Disposable (Single-use) packers with GX check-valve (tip) developed by GMA. Available for drillhole sizes between Ø44mm and Ø125mm ( (GX-mini Ø28-36mm).
The GX check-valve opens at approx. 2 Bar pressure, and does not require back pressure to close after injection. GX packers are available in both low-pressure and high-pressure versions, read more about each packer under "Product variants" below.
Low-pressure packers for injection pressures up to approx. 65 Bar (depending on packer dimensions, possible injection pressure decreases with increased diameter).
Low-pressure packer is equipped with 3 or 5 locking washers. These lock washers are sized to withstand the maximum specified injection pressure after the injection pipe is dismantled. However, consideration of the packer's friction against the rock must be observed when removing injection pipes.
Suitable injection tubes are "Mechanical Low Pressure 1/2"Pipes" or "Manual 1/2" Pipes".
The table below shows: GMA's part number, GMA's model designation, What drillhole diameter the packer is intended for, What diameter the packer has before tensioning, What work span (sealing aperture) the packer has, What connection it is on the thread on the packer tube and tube dimension on ditto, Which approximately tightening torque required and approximate Maximum injection pressure*, #.
If more information is desired, we refer to the Technical data sheet (TDS) which is available as a PDF file to read/download.
* NOTE: Consideration must be given to rock type and hole direction to finalize maximum injection pressure. The table only shows what the packer itself can handle.
# Packer over diameter 70mm can be equipped with an extra HD lock washer (high pressure washer) if requested by the customer. However, doing that requires HD type injection tubing and should not be confound (mixed up) with HD packers (it is still a Low Pressure Packer).
|
GMA part nr. |
GMA Model |
Drillhole Ø (mm) |
Outside Ø packer (mm) |
Work span |
Thread/dim. packer tube (Inch /mm) |
Tightening torque (Nm) |
Max injection pressure (Bar) |
|---|---|---|---|---|---|---|---|
| 8000845 | GX45 (CX45) | 45 | 42,5 | 44-47 | 1/2" (25x3) | 90-120 | 65 |
| 8000848 | GX48 (CX48) | 48 | 45,5 | 46-50 | 1/2" (25x3) | 100-120 | 65 |
| 8000851 | GX51 (CX51) | 51 | 48,5 | 50-53 | 1/2" (25x3) | 100-120 | 65 |
| 8000854 | GX54 (CX54) | 54 | 51,5 | 53-56 | 1/2" (25x3) | 100-120 | 50 |
| 8000857 | GX57 (CX57) | 57 | 54,5 | 56-59 | 1/2" (25x3) | 100-120 | 50 |
| 8000860 | GX60 (CX60) | 60 | 57,5 | 59-62 | 1/2" (25x3) | 100-120 | 50 |
| 8000863 | GX63 (CX63) | 63 | 60,5 | 62-65 | 1/2" (25x3) | 100-120 |
50 |
| 8000866 | GX66 (CX66) | 66 | 63,5 | 65-69 | 1/2" (25x3) | 120-150 | 40 |
| 8000870 | GX70 (CX70) | 70 | 67,5 | 69-75 | 1/2" (25x3) | 120-150 | 40 |
| 8000875 | GX75 (CX75) | 75 | 72,5 | 74-79 | 1/2" (25x3) | 120-150 | 35 |
| 8000880 | GX80 (CX80) | 80 | 77,5 | 79-84 | 1/2" (25x3) | 120-150 | 30 |
| 8000885 | GX85 (CX85) | 85 | 82,5 | 84-89 | 1/2" (25x3) | 120-150 | 30 |
| 8000890 | GX90 (CX90) | 90 | 87,5 | 89-94 | 1/2" (25x3) | 120-150 | 25 |
| 8000895 | GX95 (CX95) | 95 | 92,5 | 94-99 | 1/2" (25x3) | 120-150 | 25 |
| 80008100 | GX100 (CX100) | 100 | 97,5 | 99-104 | 1/2" (25x3) | 140-160 | 20 |
| 80008102 | GX102 (CX102) | 102 | 99,5 | 101-105 | 1/2" (25x3) | 140-160 | 20 |
| 80008105 | GX105 (CX105) | 105 | 102,5 | 104-109 | 1/2" (25x3) |
140-160 |
20 |
| 80008110 | GX110 (CX110) | 110 | 107,5 | 109-114 | 1/2" (25x3) | 140-160 | 15 |
| 80008115 | GX115 (CX115) | 115 | 112,5 | 114-119 | 1/2" (25x3) | 140-160 | 15 |
| 80008120 | GX120 (CX120) | 120 | 117,5 | 119-124 | 1/2" (25x3) | 140-160 | 10 |
| 80008125 | GX125 (CX125) | 125 | 122,5 | 124-130 | 1/2" (25x3) | 140-160 | 10 |
High-pressure packer for injection (grouting) pressures up to approx. 100 Bar.
High-pressure packers are equipped with 5 std. lock washers and an extra high-pressure washer (HD washer). These lock washers are sized to withstand the maximum specified injection pressure after the injection pipe is dismantled. In addition to internal development and testing of high-pressure packers, tests have also been made of GMA's HD packers at 3rd party (DNV Norway).
GMA's high-pressure packers require adapted injection pipes, so-called "HD-Injection pipes for mechanical mounting" which are adapted not to damage the HD lock washer during tightening and equipped with a rotating safety hook and ball valve for high pressures.
The table below shows: GMA's part number, GMA's model designation, What drillhole diameter the packer is intended for, What diameter the packer has before tensioning, What work span (sealing aperture) the packer has, What connection it is on the thread on the packer tube and tube dimension on ditto, Which approximately tightening torque required and approximate Maximum injection pressure*, #.
If more information is desired, we refer to the Technical data sheet (TDS) which is available as a PDF file to read/download.
* NOTE: Consideration must be given to rock type and hole direction to finalize maximum injection pressure. The table only shows what the packer itself can handle. In cases where there is bad rock, high pressure packers with mechanical locking are also available, see section "Special packers high pressure flow"
# HD-packers are supplied for drill holes between 48mm up to 66mm. This is based on the size of the HD washer and performed tests. In the event that injection tubes are not removed immediately after injection, other injection pressures and larger diameters can be used if necessary, but then do not fall within GMA's definition for an HD packer.
|
GMA Part nr. |
GMA Model |
Drillhole Ø (mm) |
Outside Ø packer (mm) |
Work span |
Thread/dim. packer tube (Inch /mm) |
Tightening torque (Nm) |
Max injection pressure (Bar) |
|---|---|---|---|---|---|---|---|
| 8000848HD | GX48HD (CSX48) | 48 | 45,5 | 46-50 | 1/2" (25x3) | 120-150 | 90-100 |
| 8000851HD | GX51HD (CSX51) | 51 | 48,5 | 50-53 | 1/2" (25x3) | 120-150 | 90-100 |
| 8000854HD | GX54HD (CSX54) | 54 | 51,5 | 53-56 | 1/2" (25x3) | 120-150 | 90-100 |
| 8000857HD | GX57HD (CSX57) | 57 | 54,5 | 56-59 | 1/2" (25x3) | 120-150 | 90-100 |
| 8000860HD | GX60HD (CSX60) | 60 | 57,5 | 59-62 | 1/2" (25x3) | 120-150 | 90-100 |
| 8000863HD | GX63HD (CSX63) | 63 | 60,5 | 62-65 | 1/2" (25x3) | 120-150 |
90-100 |
| 8000866HD | GX66HD (CSX66) | 66 | 63,5 | 65-68 | 1/2" (25x3) | 120-150 |
80-90 |
Low-pressure packers for injection pressures up to approx. 65 Bar (depending on packer dimensions, possible injection pressure decreases with increased diameter).
Low pressure packer is equipped with 3 pcs lock washers and these lock washers are sized to withstand the maximum specified injection pressure after the injection pipe is dismantled. However, consideration of the packer's friction against the rock must be observed when removing injection pipes.
Suitable injection tubes are Manual 3/8" tubes.
The table below shows: GMA's part number, GMA's model designation, What drill hole diameter the packer is intended for, What diameter the packer has before tensioning, What working area (sealing area) the packer has, What connection thread it is on the packer tube and tube dimension on ditto, Which approximately tightening torque required and approximate Maximum injection pressure*.
If more information is desired, we refer to the Technical data sheet which is available as a PDF file to read/download.
* NOTE: Consideration must be given to rock type and hole direction to finalize maximum injection pressure. The table only shows what the packer itself can handle.
|
GMA Part nr. |
GMA Model |
Bore hole Ø |
Outside Ø packer (mm) |
Work span |
Thread/dim. (Inch/mm) |
Tightening torque (Nm) |
Max injection pressure (Bar) |
|---|---|---|---|---|---|---|---|
| 8000828 | GX28 | 28 | 27 | 27,5-30 | 3/8" (20x25) | 70-100 | 65 |
| 8000830 | GX30 | 30 | 29 | 29,5-32 | 3/8" (20x25) | 70-100 | 65 |
| 800032 | GX32 | 32 | 31 | 31,5-34 | 3/8" (20x25) | 70-100 | 65 |
| 8000834 | GX34 | 34 | 33 | 33,5-36 | 3/8" (20x25) | 90-120 |
65 |
| 8000836 | GX36 | 36 | 35 | 35,5-38 | 3/8" (20x25) | 90-120 | 65 |
