Dart valves

5,000 psi, 10,000 psi & 15,000 psi

Designed for automatic overlap and pressurization of the drilling instrument tube channel in drilling oil and gas wells, and also in maintenance and emergency works.

Dart valve structure allows carrying out maintenance works under field conditions. The valves are produced with the right and left directed coupling thread coils.

*Increased strength and durability

Dart valve for drill string with the locking thread type KOSHZ

Dart valve Cargo capacity kN (tf) Length OD ID Coupling thread API 7 Weight
KOSHZ-73R1 500 (50) 0.82 ft /
250 mm
3 3/8"/
86 mm
1 3/16"/
30 mm
NC-26 (2 3/8 IF) 11.02 lbs/
5 kg
KOSHZ-76R1 500 (50) 0.90 ft /
275 mm
3 3/4"/
95 mm
1 1/2"/
38 mm
2 7/8 Reg 15.43 lbs/
7 kg
KOSHZ-86R1 1000 (100) 1.02 ft/
310 mm
4 1/4"/
108 mm
1 9/16"/
39 mm
NC-31 (2 7/8 IF) 28.66 lbs/
13 kg
KOSHZ-88R1 1200 (120) 1.07 ft/
325 mm
4 1/4"/
108 mm
1 1/4"/
32 mm
3 1/2 Reg 33.07 lbs/
15 kg
KOSHZ-102R1 1400 (140) 1.18 ft/
360 mm
4 6/8"/
120 mm
2 1/16"/
52 mm
NC-38 (3 1/2 IF) 35.27 lbs/
16 kg
KOSHZ-108R1 1600 (160) 1.30 ft/
395 mm
5 1/4"/
133 mm
2 1/16"/
52 mm
NC-40 (4 FH) 37.48 lbs/
17 kg
KOSHZ-117R1 1800 (180) 1.31 ft/
400 mm
5 1/2"/
140 mm
2 1/16"/
52 mm
4 1/2 Reg 39.68 lbs/
18 kg
KOSHZ-121R1 2100 (210) 1.31 ft/
400 mm
5 3/4"/
146 mm
2 1/4"/
58 mm
4 1/2 FH 44.09 lbs/
20 kg
KOSHZ-122R1 2200 (220) 1.35 ft/
410 mm
5 3/4"/
146 mm
2 1/4"/
58 mm
NC-46 (4 IF) 44.09 lbs/
20 kg
KOSHZ-133R1 2500 (250) 1.36 ft/
415 mm
6 1/8"/
155 mm
2 1/2"/
64 mm
NC-50 (4 1/2 IF) 72.75 lbs/
33 kg
KOSHZ-147R1 2600 (260) 1.53 ft/
465 mm
7"/
178 mm
2 7/8"/
73 mm
5 1/2 FH 114.64 lbs/
52 kg
KOSHZ-152R1 4000 (400) 1.64 ft/
500 mm
7 3/4"/
197 mm
3"/
75 mm
6 5/8 Reg 132.28 lbs/
60 kg

Dart valve for pump-compressor flexible pipes with tubing thread type KOSHT

Dart valve Cargo capacity kN (tf) Length OD ID Coupling thread API 5B Weight
KOSHT-38R1 110 (11) 0.69ft /
210 mm
1 7/16"/
38 mm
9/16"/
14 mm
NUE-1,315" 2.76 lbs/
1.25 kg
KOSHT-42R1 140 (14) 0.69ft /
210 mm
1 11/16"/
42 mm
5/8"/
16 mm
NUE-1,315" 3.53 lbs/
1.6 kg

Dart valve for pump-compressor pipes with tubing thread type KOSHT

Dart valve Cargo capacity kN (tf) Length OD ID Coupling thread API 5B Weight
KOSHT-42R1 140 (14) 0.46 ft /
140 mm
2"/
52 mm
5/8"/
16 mm
NUE-1,660″ 3 lbs/
1.4 kg
KOSHT-48R1 180 (18) 0.49 ft /
150 mm
2 1/5"/
56 mm
7/8"/
20 mm
NUE-1,900″ 3.3 lbs/
1.5 kg
KOSHT-60R1 300 (30) 0.61ft /
185 mm
2 7/8"/
73 mm
1 1/8"/
28 mm
NUE-2 3/8″ 6.8 lbs/
3.1 kg
KOSHT-73R1 500 (50) 0.66 ft /
200 mm
3 1/2"/
89 mm
1 3/5"/
40 mm
NUE-2 7/8″ 11 lbs/
5 kg
KOSHT-73VR1 500 (50) 0.66 ft /
200 mm
3 5/8"/
93.2 mm
1 5/8"/
43 mm
EUE-2 7/8″ 13.2 lbs/
6 kg
KOSHT-89R1 600 (60) 0.94 ft/
285 mm
4 1/4"/
108 mm
2"/
50 mm
NUE-3 1/2″ 26.5 lbs/
12 kg
KOSHT-114R1 1100 (110) 0.97 ft/
295 mm
5 1/4"/
132 mm
2 5/8"/
67 mm
NUE-4 1/2″ 33 lbs/
15 kg

RNGI

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P.O. Box 3999
E-mail: manager@rngi.net
Tel: +1 512 861-1964