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Corporate Office :

46,1st Floor, Jagat Satguru Ind. Estate Kotkar, Off., Aarey Road, Goregaon (E), Mumbai - 400 063.India.

Tel : +91-22-2927 09 61

+91-22- 6505 09 51

Fax :+91-22-2927 09 60

Register Office :

704, Kent Heights, Vardhaman Nagar,Nursing Lane, Malad (W.), Mumbai - 400 064. India.

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Hydraulics Fittings : Pipe Fittings

J. J. Pipe Fittings is manufactured as per pipe thread standards for ease of interchangeability. It is available for different pressure rating ranging from 270Bar to 760Bar.

Type

Pipe fittings

Size

1/8” to 2”

Pressure

from 270Bar to 760Bar depending on type and size

Material

Steel, Stainless Steel, Brass (From extruded bar or forging)

Surface Treatment

Steel	–	Zinc Coated (A3C) Phospatised or Trivalent Cr.
Stainless Steel	–	Electro polished, Nut Silver Plated to avoid
Galling Brass	–	Natural

Thread Specification

Thread	Standard
NPT	ANSI B1.20.1,
NPTF	NSAE J476, ANSI B1.20.3
BSPT	BS 21, ISO 7/1
BSPP	BS 2779, ISO 228/1
METRIC	ISO 261, ANSI B1.13M
UN/UNF (Class 2A / 2B)	ANSI B1.1

Theory of Operation

There are three types of tapered threads commonly use in Industrial application.

NPT/NPTF

BSPT

Metric Taper

All the three threads styles mentioned above use the same basic metal to metal sealing design for achieving a seal. Although very similar, there is difference in thread dimensions, pitch and flank angle that do not allow interchangeability.Straight or parallel thread ports in various form are becoming popular in hydraulic systems because they are more reliable and easier to service. Three types of threads are used for parallel thread ports

UN/UNF (SAE Straight threads)

BSPP (British Standard Pipe Parallel)

Metric Parallel

Because parallel threads only serve one function (i.e. holding the fittings in place), some other means of sealing is always present, such as elastomeric O ring or a metal seal. There are many variations of sealing methods, and in some cases, they are interchangeable among the different thread forms and may appear similar.

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