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| 10 Years in the Instrumentation Valves & Fittings World Market |
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With 10 Years of experience backing us, HPLOCK steps into the new millennium by erecting a state –of-the-art industrial complex. Engaging engineering firms from around the world, HPLOCK has combined the latest technologies in CNC machining, and integrated computer networking to provide the world with high-quality instrumentation valves and fittings. With HPLOCK’s advance manufacturing and logistics capabilities, we can provide our customers the products they need more efficiently – where and when they need them. |
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HPLOCK TUBE FITTINGS |
HPLOCK has produced high quality tube and pipe fittings in various materials for high pressure applications since its establishment in 2000. |
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For almost ten years, through tremendous efforts in research and development, HPLOCK has gained an excellent reputation as a leading manufactures of high pressure instrumentation products.
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| The HPLOCK range of connectors has been developed to fill the rapidly increasing demands for tube fittings suitable for high pressure use in environments such as petrochemical, fluid, power, nuclear, electronic, as well as other major industries. |
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HPLOCK tube fittings have been carefully manufactured and tested to withstand the demands of high performance tube fittings, such as high pressure, impulse, vibration, vacuum and temperature. These tube fittings are manufactured to exacting tolerances using the most modern and advanced computerized automation. One of the major conditions to producing these precision machined fittings is by maintaining stringent quality control in conjunction with skilled craftsmen. HPLOCK tube fittings |
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| are composed of four parts: 1) body, 2) front ferrule, 3) back ferrule, and 4) nut. |
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How HPLOCK Fittings Work |
The HPLOCK tube fitting is a mechanism used for both sealing and gripping tubing. Through mechanical advantage and geometry the fitting produces a leak-tight assembly.
To assemble, simply insert the tube into the complete assembly until the tube bottoms-out against the shoulder of the fitting body.
The two ferrules are driven forward between the nut and fitting body using the mechanical force created by rotating the nut clockwise.
The back ferrule (3) is driven against the tapered rear of the front ferrule (2) and the front ferrule is driven by force into the tapered mouth of the body.
The rear ferrule is swaged radically inwards on the tube while lifting the front ferrule out to from a full faced seal on the tapered surface of the body.
The 11/4 turn on the nut from the hand tight position assures consistent drive of the sealing members. This ensures an effective seal against high pressure as well as ultra high vacuum conditions. |
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| HPLOCK Installation Instructions |
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HPLOCK fittings are supplied assembled, finger tight. Disassembly before use can allow the entry of dirt or other particles. |
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Insert the tubing into the HPLOCK fitting. Check that the tube rests firmly on the fitting shoulder and thatthe nut |
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is finger tight. At this point it is recommended that a scribe mark be drawn on the hex of the nut extending onto the fitting body. This mark will serve as an indicator for the starting point and proper pull-up. |
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Tighten the nut. (see Fig. A & B ) |
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11/4 turns of the nut is required for 1/4” (6 mm) and higher.
3/4 turns of the nut is required for 3/16” (4 mm) and lower. |
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Reassembly Instructions |
HPLOCK connections may be disconnected and remade repeatedly, without loss of leak tight seal. |
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Before disconnecting, mark the position of the nut in relation to the fitting body. |
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To reassemble, use a wrench to tighten nut to original position. |
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Tighten slightly with wrench until a slight rise in torque is felt. |
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| High Safety |
In applications where severe conditions and high pressure exist, we recommend the following installation procedures: |
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Check that the nut is finger tight |
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Insert the tube (up to the shoulder). |
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Rotate the nut with a wrench unit the tube does not rotate freely. |
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Mark position of the nut. |
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Rotate the nut ¼ turns. |
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This method ensures that even if the tube O.D. is at the minimum tolerance, The ferrules will be in contact with the tube for the full 1 1/4 rotation. |
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Tubing Data for HPLOCK Fittings |
In order to assure maximum fitting reliability and performance great care should be given when selecting the tubing for each application. |
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Tube Selection: |
Four variables must be considered when ordering tube for use with HPLOCK fittings: |
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Material |
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Tube wall thickness |
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Tube surface finish |
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Tube hardness |
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Tubing should be according to standard ASTM A213 or ASTM A269, seamless, fully annealed.
The tube must be free of scratches and suitable for bending and flaring. |
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Tube OD tolerances: |
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Ovality of twice OD tolerance is not suitable for HPLOCK fittings. The tube must be reasonably round.
The ends of the tube must be free of burrs.
Tubing hardness: The hardness of the tube must be lower than the hardness of the fitting material.
The hardness must be not more than Rockwell HRB 80. |
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Tube Cutting |
There are two ways to cut tubes: |
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Tube Cutter |
To attain a leak free connection, the rubbing must be cut squarely.
A good quality tube cutter with the appropriate blade for the tubing material is recommended.
Do not try to reduce the time of cutting by taking deep cuts with each turn of the cutter. This will work harden the tube.
The end of the tube must be debarred to avoid damage to the fitting and to ensure that the tube reaches the bottom of the fitting. |
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Hacksaw cutting |
In order to cut the tube with a hacksaw and get square ends, the tube must be cut with guide blocks.
This method of cutting necessitates debarring of the tube ends. |
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Warning |
Do not hold the tube in a vise in the place where it will be inserted into the fitting (the vise will leave a mark on the tube that may cause leaks, and might cause ovality). |
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Tube Handling
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Some precautions to be taken : |
Copper Tubing |
Scratches on the tube might cause leaks. Therefore, good handing of the tube can reduce the possibility of leaks. |
1.Tubes must not be dragged on the floor. |
2.Tube must not be dragged out of a tubing |
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If copper tubing a roll is used, ensure the end of the tube is held and the roll moved away with the tubing laying on a flat surface. |
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