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Parker Hannifin Corporation

Tube Fittings Division

Columbus, Ohio

http://www.parker.com/tfd

4300 Catalog

Pipe Swivels

Dimensions and pressures for reference only, subject to change.

Introduction

Pipe swivel connections are one of the most traditional types of

hydraulic connections. NPSM swivel adapters add versatility to

male NPT hose and adapter connections. They are especially

suited formanufacturers andendusers that rely on this versatility.

As a result, equipment manufacturers can simplify their hose

assembly requirements by specifying NPSM adapters. See Fig.

H1 for an illustration of this product flexibility.

Parker offers a full line of NPSM pipe swivel adapters. Fourteen

configurations are available as standard, many of which are

available in steel and stainless steel. Parker’s pipe swivels are

designed for use with male NPT/NPTF hose fittings and adapt-

ers with a 30° machined seat.

Design and Construction

Pipe swivel adapters are manufactured in accordance to SAE

J514 specifications, and thus are designed to work in conjunc-

tion with several manufacturers’ hose and adapter products.

Unlike most pipe thread connections, NPSM swivel adapters do

not seal on the threads. NPSM swivel connections incorporate

parallel threads, as opposed to tapered.Sealing is accomplished

between the nose of the swivel and the mating seat of the NPT

pipe thread. This creates a metal-to-metal seal as shown in Fig

H2.Thus, a mating NPT male connector must have this 30° seat

to ensure proper sealing. A full internal 30° seat with surface

finish requirements of 125 Ra or better is required. See SAE

J516 for specific requirements of the 30° seat.

Construction:

Shaped pipe swivels are manufactured from a

hot forged construction. Straight adapters and crimp nuts are

manufactured from cold drawn barstock. All Parker pipe swivels

with male NPT ends include a 30° machined seat for NPSM

swivel connections.

Not all male NPT ends have the 30° seat. Parts that have

this seat will include a note in the catalog.

Threads:

NPTF:

ANSI B1.20.1, FED-STD-H28/7

NPT:

SAEJ476, ANSI B1.20.3, FED-STD-H28/8

NPSM:

ANSI B1.20.1, FED-STD-H28/7

*UN/UNF: ANSI B1.1, FED-STD-H28/2 (*Class 2A or 2B)

Assembly and Installation

Please refer t

o

Section T

f

or the assembly and installation in-

structions for Pipe Swivels.

Materials Specifications

Pipe swivels aremanufactured using state-of-the-art equipment

and manufacturing technologies to assure construction integ-

rity, long service life and the highest strength & quality. These

materials are shown in Table H1.

Upon request, pipe swivels can be furnished in materials, sizes

and configurations other than Parker’s standard offering.

Fig. H1 — Illustration of the flexibility of the NPT Port and Hose

Adapter system

Fig. H2 — Illustration showing how NPSM swivel adapters seal

on mating chamfer in male pipe thread

Note:

On request, 07 adapters can be furnished in materials other than

those shown above.

Finish:

Zinc with yellow chromate (being changed to zinc chromium 6

free) is used on all standard steel products. Stainless steel fittings are

passivated.

Table H1 — Standard Materials

Adapter Port Connection

NPSM / NPT Union

07 Adapters

Carbon Steel

Stainless Steel

ASTM Type ASTM Type

Forged Bodies

A576 1214/1215 A182 316

Bar Stock Bodies

A108 12L14 A479 316

Crimp Swivel Nuts

A108 12L14 A479 316