G-650 Testing Gun

KRAIS Tube Expanders

Key Features

G-650 Vacuum Joint Testing Gun uses air pressure to generate a vacuum around the tube-to-tubesheet joint to pinpoint leaking connections. Just insert the test gun into the tube end and press the air control valve to fill the cylinder with air. This expands a seal inside the tube, pulling a second seal firmly against the tubesheet surrounding the tube end. Next press the vacuum control valve to divert air through a venturi, creating a vacuum around the tube joint area. Any reduction in vacuum shown on the integral gauge indicates a faulty tube joint.

Interchangeable manifolds: allows the G-650 to test tube OD’s from 3/8 “ to 1-1/4” (9.52 to 31.75 mm). The G-650A is used for tube OD’s from 1-1/2” to 2-1/2” (38.1 to 63.5 mm).

Light weight: weighs less than 2.7 lbs (1.2 kg), when equipped with a 3/4” manifold.

Uses standard plant air supplies from 40 to 125 psi. Standard seal material: Neoprene, Viton® optional.

Quality Assurance System: Meets requirements of ANSI N45.2, 10CFR50 Appendix B, 10CFR21, and is certified to ISO-9001

G650 Testing Gun

NOMINAL TUBE SIZE TUBE ID SIZE RANGE GUN PART NUMBER MANIFOLD PART NUMBER SQUARE RING PART NUMBER
3/8 in (9.5 mm) 0.28 - 0.33 in (7.1 - 8.4 mm) GSC-6506 GSC-6606 GSC-6706
1/2 in (12.7 mm) 0.28 - 0.45 in (7.1 - 11.4 mm) GSC-6508 GSC-6608 GSC-6708
5/8 in (15.9 mm) 0.49 - 0.58 in (12.4 - 14.7 mm) GSC-6510 GSC-6610 GSC-6700
3/4 in (19.1 mm) 0.50 - 0.70 in (12.7 - 17.8 mm) GSC-6512 GSC-6612 GSC-6712
7/8 in (22.2 mm) 0.57 - 0.83 in (14.5 - 21.1 mm) GSC-6514 GSC-6614 GSC-6714
1 in (25.4 mm) 0.70 - 0.95 in (17.8 - 24.1 mm) GSC-6516 GSC-6616 GSC-6716
1 1/8 in (28.6 mm) 0.83 - 1.08 in (21.1 - 27.4 mm) GSC-6518 GSC-6618 GSC-6718
1 1/4 in (31.8 mm) 0.95 - 1.20 in (24.1 - 30.5 mm) GSC-6520 GSC-6620 GSC-6720

G650A Testing Gun

NOMINAL TUBE SIZE TUBE ID SIZE RANGE GUN PART NUMBER MANIFOLD PART NUMBER SQUARE RING PART NUMBER
1 1/2 in (38.1 mm) 1.20 - 1.45 in (30.5 - 36.8 mm) GSC-6524 GSC-6624 GSC-6724
1 3/4 in (44.5 mm) 1.45 - 1.70 in (36.8 - 1.70 mm) GSC-6528 GSC-6628 GSC-6728
2 in (50.8 mm) 1.70 - 1.95 in (43.2 - 49.5 mm) GSC-6532 GSC-6632 GSC-6732
2 1/4 in (57.2 mm) 1.95 - 2.15 in (49.5 - 54.6 mm) GSC-6536 GSC-6636 GSC-6736
2 1/2 in (63.5 mm) 2.20 - 2.40 in (55.9 - 61.0 mm) GSC-6540 GSC-6640 GSC-6740

G-650 Manifold Extensions

For easier testing when a channel head or water box is present

LENGTH PART NUMBER
1 ft (304.8 mm) GSC-6700-01
2 ft (609.6 mm) GSC-6700-02
3 ft (914.4 mm) GSC-6700-03
4 ft (1,219.2 mm) GSC-6700-04

G-650 / G-650A Neoprene Seal and Washer Sets

Part number, GSC-XXXX-N, where XXXX is the number listed in the chart for the appropriate tube OD and BWG

TUBE OD BWG 1/2” 5/8” 3/4” 7/8” 1” 1 1/8” 1 1/4” 1 3/8” 1 1/2” 1 5/8” 1 3/4” 2” 2 1/4” 2 1/2”
8 -9 0030 0043 0056 0068 0081 0093 0106 0118 0131 0143 0168 0193 0218
10 - 11 0037 0047 0062 0072 0087 0097 0112 0122 0137 0147 0173 0198 0223
12 -13 0028 0040 0053 0065 0078 0090 0103 0115 0128 0140 0153 0178 0203 0228
14 - 15 0033 0047 0056 0072 0083 0097 0110 0122 0134 0147 0158 0183 0208 0232
16 - 17 0037 0050 0062 0075 0087 0100 0112 0126 0137 0150 0162 0187 0212 0237
18 - 19 0040 0053 0065 0078 0090 0103 0115 0128 0140 0153 0165 0190 0215 0240
20 - 24 0042 0056 0068 0081 0093 0106 0118 0131 0143 0156 0168 0193 0218 0243

Notes:

1. G-650 seal and washer sets contain two seals and four washers.

2. For seal sizing and part numbers in SWG, metric or other tube sizes, contact KRAIS Tube Expanders.

3. Optional seal material: Viton®

4. Caution: G-650 guns cannot be used where the tubesheet is extremely corroded/eroded; where tube ends are flared and flares overlap; or where tube-to-tubesheet joints are welded.

Ordering Information: please provide tube OD and wall thickness.