PURPOSE AND SCOPE OF APPLICATION
Explosion-proof cable glands KNVTV (FETF) for non-armored cable in hoses, conduits, metal hoses are used in areas, where explosion-proof sealing on the cable sheath is required, they protect the cable against accidental pulling out. The distinct feature of explosion-proof cable glands KNVTV is the inner thread for external connection, which helps to connect flexible hoses, conduits, corrugated metal hoses, etc.
The most important development is the use of one sealing ring for the whole range of diameters of crimped cable, which reliably crimps the incoming cable and ensures Exd type of protection. One sealing ring together with mandrel or cable withstand the force in newtons, which is equal to the twentyfold diameter value (in mm) of the mandrel or the cable. This helps to use KOVTVL series explosion-proof cable glands without additional unloading of cable.
Increased wall thickness of bodies of GORELTEX cable glands considerably enhances their strength compared with cable glands of other manufacturers.
KNVTV cable glands may be used for direct insertion as a part of fireproof enclosures of IIA, IIB+H2, IIC subgroups, which have the volume exceeding 2000 cm3.
KNVTV explosion-proof cable glands are completely suitable for use with equipment having ExnR marking.
Thanks to their design, KNVTV explosion-proof cable glands ensure cable unloading. These cable glands ensure protection against pulling out without causing damage to the structure of cable sheath and conductors, as well as prevent cable overcompression.
Explosion-proof cable glands of KNVTV series are designed in Russia (Patent No. 155936, rightholder "ZAVOD GORELTEX" Co. Ltd. , operating characteristics of which significantly surpass Russian and foreign analogues.
Scope of application – outdoor and indoor hazardous areas as per explosion protection marking, GOST 30852.13-2002 (IEC 60079-14:1996), dangerous production facilities of I, II, III, IV hazard class supervised by Rostechnadzor of the RF and national technical supervision bodies of the Customs Union and CIS countries.
Marking:
1Ex db IIC Gb 1Ex e IIC Gb 2Ex nR IIC Gc Ex tb IIIC Db 1Ex db IIC Gb X* 1Ex e IIC Gb X* 2Ex nR IIC Gc X* Ex tb IIIC Db X* 1Ex d IIC Gb)
| Cable gland dimension type | Thread | Dimensions, mm | Diameter of crimped cable, mm | Mass, kg |  all files |
|||||
| Main | Alternative | АС1 | АС2 | АС3 | ØМ | С | ||||
| KNVTV02M | FETF02I | M12x1,5 | 24 | 24 | - | 26 | 67 | 3-7 | 0,12 | |
| KNVTV01M | FETF01M | M16x1,5 | 24 | 24 | - | 26 | 67 | 3-8 | 0,116 | |
| KNVTV1M | FETF1I | M20x1,5 | 26 | 27 | 24 | 28,5 | 82,5 | 6-12 | 0,21 | |
| KNVTV1M.../Р | FETF1I.../R | M20x1,5 | 26 | 27 | 24 | 28,5 | 82,5 | 3-12 | 0,21 | |
| KNVTV2M | FETF2I | M25x1,5 | 34 | 35 | 28 | 38 | 88,5 | 12-18 | 0,32 | |
| KNVTV2M.../Р | FETF2I.../R | M25x1,5 | 34 | 35 | 28 | 38 | 88,5 | 6-18 | 0,32 | |
| KNVTV3M | FETF3I | M32x1,5 | 40 | 40 | 36 | 44,5 | 93,5 | 18-25 | 0,351 | |
| KNVTV3M.../Р | FETF3I.../R | M32x1,5 | 40 | 40 | 36 | 44,5 | 93,5 | 12-25 | 0,351 | |
| KNVTV4M | FETF4I | M40x1,5 | 50 | 50 | 45 | 56 | 90 | 25-31 | 0,525 | |
| KNVTV4M.../Р | FETF4I.../R | M40x1,5 | 50 | 50 | 45 | 56 | 90 | 18-31 | 0,525 | |
| KNVTV5M | FETF5I | M50x1,5 | 57 | 60 | 54 | 67 | 98,5 | 31-39 | 0,761 | |
| KNVTV6M | FETF6I | M63x1,5 | 68 | 70 | 67 | 77 | 105,5 | 39-47 | 1,169 | |
| KNVTV7М | FETF7I | M75x1,5 | 86 | 92 | - | 100 | 92,5 | 47-55 | 1,846 | |
| KNVTV71М | FETF71I | M75x1,5 | 86 | 92 | - | 100 | 92,5 | 55-63 | 1,5 | |
| KNVTV8М | FETF8I | M90x1,5 | 102 | 108 | - | 120 | 96,5 | 63-71 | 2,408 | |
| KNVTV81М | FETFS8I | M90x1,5 | 102 | 108 | - | 120 | 96,5 | 71-79 | 1,902 | |
| Cable gland dimension type | Thread | Dimensions, mm | Diameter of crimped cable, mm | Mass, kg | |||||
| Main | Alternative | АС1 | АС2 | АС3 | ØМ | С | |||
| KNVTV02N | FETF02N | 1/4" | 24 | 24 | - | 26 | 66,5 | 3-7 | 0,12 |
| KNVTV01N | FETF01N | 3/8" | 24 | 24 | - | 26 | 66,5 | 3-8 | 0,121 |
| KNVTV1N | FETF1N | 1/2" | 26 | 27 | 26 | 28,5 | 84 | 6-12 | 0,23 |
| KNVTV1N.../P | FETF1N.../R | 1/2" | 26 | 27 | 26 | 28,5 | 84 | 3-12 | 0,23 |
| KNVTV2N | FETF2N | 3/4" | 34 | 35 | 34 | 38 | 91,5 | 12-18 | 0,35 |
| KNVTV2N.../Р | FETF2N.../R | 3/4" | 34 | 35 | 34 | 38 | 91,5 | 6-18 | 0,35 |
| KNVTV3N | FETF3N | 1" | 40 | 40 | 40 | 44,5 | 103 | 18-25 | 0,445 |
| KNVTV3N.../Р | FETF3N.../R | 1" | 40 | 40 | 40 | 44,5 | 103 | 12-25 | 0,445 |
| KNVTV4N | FETF4N | 1 1/4" | 50 | 50 | 50 | 56 | 103 | 25-31 | 0,698 |
| KNVTV4N.../Р | FETF4N.../R | 1 1/4" | 50 | 50 | 50 | 56 | 103 | 18-31 | 0,698 |
| KNVTV5N | FETF5N | 1 1/2" | 57 | 60 | 53 | 67 | 110 | 31-39 | 0,812 |
| KNVTV6N | FETF6N | 2" | 68 | 70 | 66 | 77 | 114 | 39-47 | 1,258 |
| KNVTV7N | FETF7N | 2 1/2" | 86 | 92 | - | 100 | 110 | 47-55 | 1,93 |
| KNVTV71N | FETF71N | 2 1/2" | 86 | 92 | - | 100 | 110 | 55-63 | 1,6 |
| KNVTV8N | FETF8N | 3" | 102 | 108 | - | 120 | 115 | 63-71 | 2,5 |
| KNVTV81N | FETFS8N | 3" | 102 | 108 | - | 120 | 115 | 71-79 | 2 |
| RKN type | Name of metal hose | Inside diameter of metal hose, mm | Diameter of KNVTV external connection thread, G cylindrical pipe thread GOST 6357-81 |
| RKN12 | RZ-TSKH-12, MRPI-12 | 12 | 1/2" |
| RKN15 | RZ-TSKH-15, MRPI-15 | 15 | 1/2" |
| RKN16НК | GERDA-MG-16 | 16 | 1/2" |
| RKN20+AB-2GВ-1GН | RZ-TSKH-20, MRPI-20 | 20 | 1/2" |
| RKN20 | RZ-TSKH-20, MRPI-20 | 20 | 3/4" |
| RKN22НК | GERDA-MG-22 | 22 | 3/4" |
| RKN25+AB-3GВ-2GН | RZ-TSKH-25, MRPI-25 | 25 | 3/4" |
| RKN25 | RZ-TSKH-25, MRPI-25 | 25 | 1" |
| RKN25НК | GERDA-MG-25 | 25 | 1" |
| RKN32+AB-4GВ-3GН | RZ-TSKH-32, MRPI-32 | 32 | 1" |
| RKN32 | RZ-TSKH-32, MRPI-32 | 32 | 1 1/4" |
| RKN35НК | GERDA-MG-35 | 35 | 1 1/4" |
| RKN38+AB-5GВ-4GН | RZ-TSKH-38, MRPI-38 | 38 | 1 1/4" |
| RKN38 | RZ-TSKH-38, MRPI-38 | 38 | 1 1/2" |
| RKN40НК | GERDA-MG-40 | 40 | 1 1/2" |
| RKN50+AB-6GВ-5GН | RZ-TSKH-50, MRPI-50 | 50 | 1 1/2" |
| RKN50 | RZ-TSKH-50, MRPI-50 | 50 | 2" |
| RKN60+AB-7GВ-6GН | RZ-TSKH-60, MRPI-60 | 60 | 2" |
| RKN60 | RZ-TSKH-60, MRPI-60 | 60 | 2 1/2" |
| RKN75+AB-8GВ-7GН | RZ-TSKH-75, MRPI-75 | 75 | 2 1/2" |
| RKN75 | RZ-TSKH-75, MRPI-75 | 75 | 3" |
* In order to connect the metal hoses with different combination of inside diameter and diameter of crimped cable, it is required to use other size of AV adapter.
| KNVTV | X | Х | Х | Х | Х | / | Х | – TU 3400-007-72453807-07 |
| Cable gland type | ||||||||
| Dimension type | ||||||||
| Thread type: Taper inch NPT - N; Metric GOST 24705 - M; Taper pipe GOST 6211-81 - R; Pipe cylindrical GOST 6357-81 - G | ||||||||
| Dimension type for outer connection thread* | ||||||||
| Type of thread for outer connection thread**: Taper pipe NPT - N; Metric GOST 24705 - M;
Taper pipe GOST 6211-81 - R; Pipe cylindrical GOST 6357-81 - G |
||||||||
| Cable gland material: Nickel-plated brass - NK, Stainless steel - N | ||||||||
| Options, accessories and versions |
* Code of dimension type for outer thread shall not be indicated if the thread coincides with the inner one.
**Code of type for outer thread shall not be indicated if the thread coincides with the inner one.
Example:
