Pressure fittings, 5 installation – Setra System Model 3200 User Manual

Page 6

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01 = G 1/4” Ext.

04 = 7/16”-20 uNF w/37° Flare 1J = 7/16”-20 with O-Ring 02 = 1/4”-18 NPT Ext.

4D = 1/8”-27 NPTF

Dryseal Ext.

05 = G 1/4” A Integral

Face Seal

2T = M12 x 1.5 HP

Metal Washer Seal

1G = 1/4-SAE

Female 7/16 w/Schrader

Pressure Fittings

Notes: The diameter of all cans is 0.748” (19mm). Hex is 0.866” (22mm) across flats for (A/F) for deep socket mounting.

Diagram B

2.4 Pressure Fittings (See Diagram B below)

NPTF (Dryseal & Standard Tapered Threads): “Dryseal” Pipe threads are designed

to seal pressure tight joints without the need of compounds. To accomplish the

seal, the root of both internal and external threads are truncated slightly more

than the crests, i.e. roots have wider flats than crests. Therefore, metal-to-metal

contact occurs when wrenching and crushing the sharper crests of the mating

thread, thus creating the pressure tight joint and preventing spiral leakage.

However, where functionally not objectionable, Setra recommends the use of

an Anaerobic sealing compound to ensure an absolute pressure tight seal and

minimize thread galling. Standard taper threads require the use of a sealing

compound and are not interchangeable with “R” designed threads.

2.5 Installation

Voltage and current units can be installed by either wrench or deep socket. Sizes

22 A/F and 27 A/E. The tightening torque depends upon the material and the

sealing mechanism. The tightening torque should not exceed 30Nm in any case.

Vibration: 50g Sinusoidal 20—200Hz

Operation: Having installed the transducers as instructed, they are ready for use.

Before applying power, check that the correct polarity and excitation levels are

being applied.

0.28 (7)

0.49 (13)

0.28 (7)

0.55 (14)

0.28 (7)

0.44 (11)

0.28 (7)

0.57 (14)

0.28 (7)

0.38 (10)

0.28 (7)

0.43 (11)

0.28 (7)

0.65 (17)

0.28 (7)

0.67 (17)

0.28 (7)

0.35 (9)

0.28 (7)

0.47 (12)

0.63 (16)

0.28 (7)

0.37 (10)

0.55 (11)

OL = M12 x 1.5

1P = SAE6

(9/16-18uNF 2A

Heavy Duty)

OE = Female

1/4”-18NPT Int.

OK = M14 x 1.5

Straight

in. (mm)

0.28 (7)

0.38 (10)

08 = 1/8-27 NPT Ext.

0.28 (7)

0.57 (14)

4c = 1/4”-18 NPTF

Dryseal Ext.

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