Mosmatic 33.910 Swivel Seal Kit NW6 DGG/DGS/DGL - 1940

Maintain Your Mosmatic Swivel Without Full Replacement

The Mosmatic 33.910 is a replacement swivel seal kit built to restore sealing performance on 1/4" (NW 6) Mosmatic swivels in the DGG, DGS, and DGL series. Rather than discarding an entire swivel assembly, this kit allows users to rebuild leaking or worn-out swivels by replacing the internal NBR (nitrile rubber) O-ring seals - extending service life and eliminating leaks under high-pressure use. The Mosmatic 33.910 kit includes NBR O-ring seals sized precisely for the NW 6 bore, making it a fast, practical solution for in-house maintenance instead of full swivel replacement.

Why You'll Love the Mosmatic 33.910 Swivel Kit

Less downtime, fewer leaks, and smoother rotation - that's what a fresh set of seals delivers. Here's why this kit earns its place in every service van and workshop:

• Leak-free performance – Fresh NBR O-rings restore the tight seal your swivel needs, reducing water loss, mess, and the safety risks that come with high-pressure fluid escaping at connection or rotation joints.

• Extends swivel life – The 33.910 kit helps extend the service life of Mosmatic swivels by protecting internal metal components from corrosion and wear caused by fluid ingress.

• Fast on-site repair – Technicians and operators can service the swivel on location without sending equipment away, keeping wash bays and job sites running.

• Reliable under pressure – The seals in the kit are engineered for high-pressure cycling, and NBR rubber handles oils, greases, and the common detergents found in pressure-washing environments with proven durability.

• Clean, precise rotation – New seals help maintain smooth swivel action, improving control of guns, lances, or surface cleaners and reducing the torque needed to initiate rotation.

What Makes This Swivel Kit Different

Generic O-ring assortments and improvised repairs might look like they fit, but a slightly wrong cross-section, inferior hardness, or incompatible rubber compound can lead to premature failure - especially under demanding duty cycles.

The Mosmatic 33.910 swivel kit is built differently:

• Engineered for 1/4" (NW 6) Mosmatic swivels – Every O-ring matches the exact groove depth, profile, and cross-section of the DGG, DGS, and DGL series swivel bodies. No guesswork, no trimming, no compromise.

• Matched NBR seal material – NBR (nitrile rubber) is selected for its resistance to oils, greases, and moderate detergents - the everyday fluids encountered in pressure-washing and hydraulic environments. It maintains elasticity across a wide working temperature range.

• OEM-level reliability – Using a genuine Mosmatic kit keeps performance consistent with factory specifications, preserves dimensional accuracy, and simplifies any future technical support queries because every spec reference is matched.

How the Mosmatic 33.910 Swivel Kit Works

The kit replaces worn O-rings and sealing elements inside a compatible Mosmatic swivel, restoring the unit to leak-free operation in a straightforward sequence.

First, the swivel is disassembled to expose the internal seal passages and grooves within the 1/4" (NW 6) flow path. Old seals are carefully removed and the grooves inspected for damage or debris. Next, the new NBR O-rings and seals from the 33.910 kit are lightly lubricated with a compatible grease and seated into their designated positions, ensuring no twisting or pinching. Finally, the swivel is reassembled, re-pressurized, and checked - smooth rotation and zero leakage across all ports confirm a successful rebuild. The Mosmatic swivels are designed to handle both radial and thrust forces, and properly installed seals ensure both load paths remain protected.

Product Details: Mosmatic 33.910 Swivel Repair Kit

A quick spec overview for installers, technicians, and fleet owners who need to confirm compatibility at a glance:

• Product type: Seal / repair kit specifically for Mosmatic swivels

• Nominal width (NW): 1/4" (NW 6) - the nominal width of the kit is ¼ inch, matching the internal bore and groove geometry of compatible swivels

• Standard seal material: O-ring NBR (nitrile rubber) - resistant to oils, greases, and typical pressure-washing detergents

• Compatible swivel series: DGG, DGS, and DGL series at NW 6

• Maximum pressure: The maximum pressure for Mosmatic swivels is 3600 psi

• Typical compatible applications: High-pressure guns, lances, hose swivels, compact surface cleaners, and automatic car wash systems using 1/4" Mosmatic swivels

• Included components: A complete set of correctly sized NBR O-rings and seals for one swivel rebuild (no tools, bearings, or metal body parts included)

• Operating environment: Suitable for cold and moderate hot-water pressure washing; extremely aggressive chemicals or very high temperatures may require alternative seal materials

• Packaging: Parts come labeled and bagged for easy identification and storage in service vans or workshops

• Warranty / support: Covered by the same quality expectations as other Mosmatic OEM parts

Additionally, the Mosmatic Swivel Conversion Kit fits most surface cleaners and converts to a Mosmatic DYT or DYC series swivel. The conversion kit costs less than a replacement swivel assembly, making it another option worth considering alongside this seal kit. The kit is used in automatic car wash systems and hydraulic systems where reliable sealing under continuous operation is essential. The kit is intended to restore leak-free performance in high-pressure applications across all these environments.

Who the 33.910 Swivel Kit Is For

This kit is a maintenance essential for anyone running Mosmatic-based pressure systems who wants to share fewer headaches with their crew and more uptime with their clients:

• Professional pressure-washing contractors who use Mosmatic swivels daily on guns, lances, or small surface cleaners

• Facility and fleet maintenance teams responsible for keeping wash bays, truck washes, and equipment-cleaning stations operational

• Equipment dealers and service shops that regularly rebuild or refurbish high-pressure cleaning gear

• DIY users with Mosmatic components who prefer preventive maintenance over waiting for a complete swivel failure

Always confirm your swivel model and 1/4" (NW 6) sizing before ordering to ensure a correct fit.

Frequently Asked Questions About the Mosmatic 33.910 Swivel Kit

Is this a complete swivel? No. The 33.910 is a seal / repair kit only. It includes the internal NBR O-rings and sealing elements - the metal swivel body, bearings, and shaft are not included.

Which swivels does the 33.910 kit fit? The kit is designed for DGG, DGS, and DGL series swivels with a 1/4" nominal width (NW 6). Always verify your exact swivel model before ordering.

What material are the seals made from? The kit uses NBR (nitrile rubber) O-rings as the standard seal material, chosen for its proven resistance to oils, greases, and moderate detergents in pressure-washing environments.

Can I install the kit myself? Yes - basic mechanical skills and suitable hand tools are recommended. Many technicians and experienced operators perform the rebuild in-house, avoiding the need to send equipment out for service.

How often should I replace swivel seals? Replacement intervals depend on operating hours, system pressure, and chemical exposure. In moderate daily use with clean water and mild detergent, inspect seals every few hundred operating hours. Harsh chemicals or hot-water applications may require more frequent replacement.

What if my application uses aggressive chemicals or very hot water? NBR performs well under standard conditions but is not ideal for strong acids, bleach, or sustained high temperatures beyond approximately 120 °C. If your setup demands greater chemical or thermal resistance, consult with your supplier about alternative seal materials such as EPDM or FKM.

Ready to Refresh Your Mosmatic Swivel?

Stop replacing entire swivel assemblies when a fresh set of seals can restore factory-like performance. The Mosmatic 33.910 swivel kit puts your 1/4" (NW 6) Mosmatic swivel back to work - leak-free, smooth, and pressure-ready - using the correct NBR O-rings engineered for the job.

Add the 33.910 to your maintenance stock today and keep your equipment running instead of waiting on replacements.