D-Lok

Tube Fittings

Information

Inspection and Testing

At D-lok, We supply thoroughly inspected and tested high quality products to meet the needs of our clients. All tests are performed in accordance to the specifications provided by our client as well as the American Society for testing and Materials (ASTM)

Limited Lifetime Warranty

D-lok warrants to the purchaser that D- lok tube fittings are free from defects in materials and workmanship and will perform substantially in accordance with the product specifications. This warranty is extended to Individual components as well as complete assemblies; provided they are in compliance with product installation and operation instructions. Defects resulting from operator abuse, negligence, misapplication; failure to install, adjust, and operate according to manufacturer instructions will not be covered.

In the product should become defective during the warranty period, D-lok will replace it free of harge, provided the defective component is returned along with date of purchase and statement of defect.

D-lok liability is limited to this written warranty. No other warranty is expressed or implied, nor does this warranty cover so-called incidental or consequential damages.

Table 1

MAXIMUM ALLOWABLE WORKING PRESSURE AT

Qarious Temperatures
Using Allwable Stress Factors Table 1.

To determine maximum allowable working pressure at elevated
temperatures, multiply working pressure from table 2,3 and 4 by
factor shown in Table 1.

Table 2

COPPER TUBING

High quality soft annealed seamless copper tubing ASTM B-75 or equibalent.

Table 3

STAINLESS STEEL TUBING

Fully annealed high quality (Type 340, 316, etc.) (Seamless or Welded) Stailess Steel hydraulic tubing ASTM A-269 or A-213 or equivalent. Hardness = Rb80 or less Tubing free of scratches, suitable for bending and flaring.

Features

D-lok tube fittings have been specifically designed for use on instrumentation, process and control systems, equipment employed in chemical, petroleum, nuclear power generation, and plup and paper plants. The D-lok tube fitting has also found extensive application in other fields where a very high quality tube fitting is required.

Construction and Materials

D-lok tube fittings are sequential phase-controlled action, sealing and gripping devices. Superior design, rigid manufacturing tolerances, and strict quality assurance programs produce an all-metal sealing and holding device which performs leak-free when properly installed. D-lok tube fittings consist of a body, a nut, and ferrules and are constructed of one of the following materials: brass. 316/304 stainless steel, steel, nickel alloy, monel, or inconel. Straight fittings are machined from cold finished bar stock and shaped bodies are machined from close grain forgings. The materials used, fully conform to the chemical requirements of one or more of the specifications listed in Table 5 on this page. Nut internals are supplied standard with silver plating. For nuclear and other critical applications, stainless steel D-lok tube fittings are readily available with documented heat code traceability.

Installation
ASSEMBLY INSTRUCTIONS

D-lok tube fittings can be installed by using readily available wrenches.
1. Insert the tubing into the D-lok fitting until the tubing sits on the shoulder of the body. Make sure the nut is finger-tight.
2. From the finger-tight position, rotate the nut 3/4 for sizes between 1/16-inch and 3-16-inch; and 1-1/14 turn for the sizes between 1/4-inch and 1-inch

REASSEMBLY INSTRUCTIONS

D-lok tube fittings can be assembled and disassembled repeatedly. The following instructions should be carried out to reassemble a fitting. 1. Insert the tubing with the previously set ferrules into the D-lok fitting until the tubing sits on the shoulder of the body. Make sure the nut is finger-tight. 2. Using a wrench, from the finger-tight position, rotate the nut 3/4 for sizes between 1/16-inch and 3/16-inch; and 1-1/4 turn for the size between 1/4-inch and 1-inch until snug, Then tighten a little more.