What a Pump-Side Swivel Does
The 90 degree swivel joint mounts at the outlet of an air-operated grease pump. Its body bends the flow 90 degrees while an internal ball-bearing race lets the lower half rotate a full 360 degree, so the hose below can follow the gun without twisting. A twisting hose work-hardens and fails early at the coupling, and the swivel removes that twist at the source. Marine buyers order the joint by its IMPA catalogue code 617416.
Swivel Joint Specifications
| Item | Declared value |
|---|---|
| Catalogue code | IMPA 617416 |
| Working pressure | 10,000 PSI |
| Proof pressure | 15,000 PSI, one and a half times working |
| Flow | up to 2.5 GPM at 3,000 PSI |
| Rotation | 360 degree continuous, under 0.5 Nm torque |
| Temperature range | -20°C to +80°C |
| Seals | NBR 70 A plus polyurethane 90 A double seal |
| Race and body | ball-bearing race, zinc-plated steel body |
Thread Forms and Fit
The pump-side thread on this configuration is a 1/4 in G parallel male thread. G parallel and NPT threads are not interchangeable: a G male will not seal in an NPT female, and forcing the pair damages both. Confirm the pump outlet thread before ordering, since air grease pumps ship with either form depending on market. The swivel family covers other thread combinations, listed below, but each configuration is ordered exactly as declared.
Installation at the Pump Outlet
Thread the swivel into the pump outlet by hand until snug, then tighten with a spanner on the hex flats only. Do not grip the swivel body or the rotating lower half, and do not use the hose to rotate the joint during installation. Do not shock-load the assembly: side loads and hammer blows shorten seal and race life. After installation, turn the swivel through several full rotations by hand to confirm free movement before pressurizing the line.
Orderable Configurations
| Family code | Thread configuration |
|---|---|
| 81974 | 1/2-27 to 1/4 NPT |
| 82087 | 1/2 NPT to 1/2 NPT |
These configurations belong to the same swivel family and share the 10,000 PSI working class. If your pump and hose threads do not match either row, ask through our quote request page before ordering.
Related Hose-End Components
For gun-side connections, a coupler grips the nipple: see the double handle grease gun coupler and the 4-jaw high pressure coupler. For three-axis movement at a reel or boom, see the triple swivel joint. The hose itself pairs with the high pressure hose and fitting page.
Frequently Asked Questions
How is a swivel different from a coupler?
The swivel relieves twist at the pump outlet, where the hose meets the pump. A coupler grips the nipple at the grease gun end of the hose.
What does 90 plus 360 mean?
The body holds a fixed 90 degree bend between pump and hose. The inner race rotates 360 degree continuously, so the hose follows without twisting.
Will it fit my pump?
This configuration has a 1/4 in G parallel male pump-side thread. G parallel and NPT are not interchangeable, so confirm the pump outlet thread when ordering.
Why does the hose twist without one?
Each gun movement rotates the hose a little at the coupling. Over time the hose work-hardens and fails early at that point.
What does the 10,000 PSI class mean for grease work?
It matches the working class of the coupler family used on the same circuits. Grease transfer at the pump outlet stays inside that rating.
What seals does it use?
An NBR 70 A plus polyurethane 90 A double seal runs on a ball-bearing race. Seal wear depends on duty, so inspect the swivel during routine checks.
How do marine buyers order it?
By IMPA catalogue code 617416, the marine stores listing for this swivel. The code identifies the item in ship chandlery catalogues.
Can it go on the gun side?
No, the gun side uses a coupler that grips the nipple. See the 4-jaw coupler or double handle coupler pages for gun-side options.
What does the proof pressure mean?
The swivel is proof-tested at 15,000 PSI, one and a half times its 10,000 PSI working pressure. For help matching it to your pump, use our quote request page.
Who builds this swivel?
IsoHiTech Lubrication Systems, founded in 2023, engineering since 2006, builds and supports every unit. Email inquiry@isohitech.com for specifications and a quotation.
