| Instrumentation :: Tube Fittings :: Features& Installation |
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| APPLICATION |
PMT 37 degree flared Tube Fittings is compact and simple in design for assembly and assures maximum reliability and performance.
It is especially suited for low and medium wall tubing with good vibration resistance in a broad selection of types and sizes.
It is used in virtually every application that uses fluid power for motion control & automation. |
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DESIGN
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PMT 37 degree flared Tube Fittings consist of three precision components such as Body, Sleeve and Nut. These components have been manufactured to very stringent tolerances under rigid quality control procedure approved to ISO 9001 : 2000.
PMT 37 degree flared Tube Fittings meets SAEJ514 Standard.
The Tube end is flared at a 37 degree angle and sandwiched between the fitting body nose (seat) and the sleeve with nut which provide a very effective leakproof joint, full flow connection in process tubing.
PMT 37 degree flared Tube Fittings are available as a standard in SS316 material, which meets the following specifications. |
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| A. SS316 Bar Stock |
ASTM A-479 |
| B. SS316 Forging |
ASTM A-182 |
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| Other materials are available on request. |
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| PRESSURE RATING |
PMT 37 degree flared Tube Fittings provide zero leak, full flow connection in hydraulic system operating at working pressure as specified below.
Allowable working pressure ratings are based on min. design factor 4:1 for dynamic and 3: 1 for static application.
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| Nom. Tube OD Inch |
37° Flare Straight Thread |
Nom. Pipe Size |
SAE St. Threads Union and Bulkhead |
Fittings with Pipe Thread |
| 1/8 |
5/16''x24 |
1/8'' |
5000 |
5000 |
| 3/16 |
3/8"x24 |
1/8'' |
5000 |
5000 |
| 1/4 |
7/16"x20 |
1/8'' |
5000 |
5000 |
| 5/6 |
1/2"x20 |
1/8'' |
5000 |
5000 |
| 3/8 |
9/16"x18 |
1/4" |
5000 |
5000 |
| 1/2 |
3/4"x16 |
3/8" |
4500 |
4000 |
| 5/8 |
7/8"x14 |
1/2" |
3500 |
3000 |
| 3/4 |
1-1/16"x12 |
3/4" |
3500 |
3000 |
| 7/8 |
1-3/16"x 12 |
3/4" |
3500 |
2500 |
| 1 |
1-5/16"x12 |
1" |
3500 |
2000 |
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| Note:- Since many factors influence the pressure at which a system will or will not perform satisfactorily. Details as shown in the above table are only guideline & not rigid. |
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| AVAILABLE SIZES |
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| Fractional Size |
Ranges from 1/8" through 1" |
| Metric Size |
Ranges from 6mm through 25 mm |
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| QUALITY OF TUBING |
| Stainless Steel 316 or 304 seamless tubing should be fully annealed, according to Standard ASTM-269 suitable for bending and flaring. Length of finished tubing shall be reasonable straight and have smooth ends and free from burrs, scales and any kind of defect and scratches. |
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| AVAILABLE SIZES |
Due to variation in tube diameters for high pressure and safety systems, a common starting point is desirable. To achieve this ( a wrench snug up the nut until the tube cannot be rotated by hand. From this point the nut should be rotated
one and a quarter turns.)
For sizes upto 1/8" in imperial tube fittings and 4 mm in metric tube fittings only 3/4 turn from finger tight position is necessary |
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| Metric size ranges from: |
4mm through 16mm Tube OD |
| Fractional size ranges from: |
3/16" through 5/8" Tube OD. |
| Recommended tolerance on tube ±0.05 mm |
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| QUALITY OF TUBING |
| Stainless Steel 316 or 304 seamless tubing should be fully annealed, according to Standard ASTM-269 suitable for bending and flaring. Length of finished tubing shall be reasonable straight and have smooth ends and free from burrs, scales and any kind of defect and scratches. |
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| ASSEMBLY INSTRUCTION |
- Ensure that the end of the tube is cut square within ±1 degree and remove the burrs and sharp edges.
- Wipe the ID and the OD of the deburred Tube end properly.
- Insert the nut and sleeve on to the tube as shown below
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| APPLICATION |
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| Flare the Tube with a special flaring tool to 37 degree, dimensions of Flared Tube according to SAEJ533 standard as shown below |
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| The Dimensions of the flared tube according to SAEJ533 are shown below |
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Nominal Tube O.D.
Inch |
A
Single Flare Diameter |
R |
S |
| E |
F |
| Inch |
mm |
Inch |
mm |
Inch |
mm |
| Max. |
Min. |
Max. |
Min. |
±0.02 |
±0.5 |
±0.02 |
±0.5 |
| 1/8 |
0.20 |
0.18 |
5.08 |
4.58 |
0.03 |
0.8 |
0.035 |
0.88 |
| 3/16 |
0.28 |
0.26 |
7.11 |
6.61 |
0.03 |
0.8 |
0.035 |
0.88 |
| 1/4 |
0.36 |
0.34 |
9.14 |
8.64 |
0.03 |
0.8 |
0.065 |
1.65 |
| 5/16 |
0.43 |
0.40 |
10.92 |
10.16 |
0.03 |
0.8 |
0.065 |
1.65 |
| 3/8 |
0.49 |
0.46 |
12.44 |
11.69 |
0.04 |
1.0 |
0.065 |
1.65 |
| 1/2 |
0.66 |
0.63 |
16.76 |
16.01 |
0.06 |
1.5 |
0.083 |
2.1 |
| 5/8 |
0.79 |
0.76 |
20.06 |
19.31 |
0.06 |
1.5 |
0.095 |
2.41 |
| 3/4 |
0.95 |
0.92 |
24.13 |
23.37 |
0.08 |
2.0 |
0.109 |
2.76 |
| 7/8 |
1.07 |
1.04 |
27.17 |
26.42 |
0.08 |
2.0 |
0.109 |
2.76 |
| 1 |
1.20 |
1.17 |
30.48 |
29.72 |
0.09 |
2.3 |
0.120 |
3.04 |
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Dimensions are for reference only, and are subject to change without notice. |
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| Screw the nut on the body until finger tight. Further tighten the nut with a wrench ¼'' turn in order to make a leakproof metal to metal sealing connection. |
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| ORDERING INFORMATION |
| The Part Number describes fittings body only. |
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| Example for Fractional Size : FLMC-250-250-N/E |
| FLMC |
250 |
250 |
N |
E |
| Type of fittings |
Tube OD |
Pipe Thread |
Type of Thread |
Material |
| Male Connector |
1/4'' |
1/4'' |
NPT |
SS 316 |
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| Example: For Fractional size: FLMC-6-250-RT/E |
| FLMC |
6 |
250 |
RT |
E |
| Type of fittings |
Tube OD |
Pipe Thread |
Type of Thread |
Material |
| Male Connector |
6mm |
1/4'' |
BSPT |
SS 316 |
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| Size Code Description: |
| Inch |
Metric |
| Size |
Code |
Size |
Code |
Size |
Code |
Size |
Code |
| 1/8 |
125 |
5/8 |
625 |
3mm |
3 |
15mm |
15 |
| 3/16 |
187 |
3/4 |
750 |
4mm |
4 |
16mm |
16 |
| 1/4 |
250 |
7/8 |
875 |
6mm |
6 |
18mm |
18 |
| 5/16 |
312 |
1 |
1000 |
8mm |
8 |
20mm |
20 |
| 3/8 |
375 |
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10mm |
10 |
22mm |
22 |
| 1/2 |
500 |
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12mm |
12 |
25mm |
25 |
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14mm |
14 |
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| Material Code Description : |
| Type of Material |
Material Code |
| SS316 |
E |
| Carbon Steel |
CS |
| Viton® |
V |
| Buna-N |
B |
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| Pipe Thread Description : |
| Thread Type |
Code |
| NPT Thread |
N |
| ISO Tapered Thread (BSPT) |
RT |
| SAE/MS Straight Thread |
SE |
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