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EVO Swivel Q.E.V

Table of Contents.

  • Before you start
  • Safety
  • Product description
  • Prerequisites
  • Required tools and spare parts
  • Removal of part
  • Installation of part
  • Notes

Before You Start

Please Note.

It is recommended that installation of any Belsales or EVO Parts is carried out by a trained and qualified airsmith. Incorrect installation of any component onto or into a paintball marker or any accessory may result in serious injury or death. Belsales LTD, its staff or any of its subsidiaries cannot be held responsible for any result arising from improper installation. If you are at all unsure about the correct installation procedure for any Belsales or EVO product we strongly advise that you seek professional assistance or contact any of the technical staff at Belsales LTD using any of the details provided on the contact page. Before starting any work on your marker, please read and carry out the instruction in the section marker "safety"


Before staring out with any work on your marker, please carry out the safety checks:

  • Make sure you, and everyone around you are wearing safety goggles
  • Remove any paintballs from your marker
  • Point the marker in a SAFE direction and visually, then mechanically check that there are no paintballs in the marker
  • Detach the power supply (air or C02 source) and shoot the marker a number of times in the safe direction
  • Continue to de-gas the marker until there is no pressure left anywhere in the marker.
  • Detach the barrel of the marker.
  • Keeping your goggles on, commence work on your marker

Product Description

The DART Quick Exhaust Valve (Q.E.V) is a diaphragm operated tri-directional hosing elbow capable of being used in a number of applications. The elbow is sensitive to flow direction, switching the resulting direction of flow depending on the input direction. It is used most commonly in applications where performance increases can be made by exhausting a chamber as fast as possible. By truncating the exhaust channel (the air may exhaust at the elbow, negating the requirement for it to back flow along small bore hosing) removes the distance that air must flow in order to be fully exhausted, thus removing the length and severity of obstructions.

The Q.E.V is male threaded 10/32" on one end, and on the other end of the 90 degree fitting, there is a nipple designed to take 1/8" External Diameter low pressure hosing. The Q.E.V had been used to excellent effect on a number of paintball markers. Most commonly QEV's are used on 44 Magnum Rams.



The fitting of this part requires a MODERATE degree of competency in mechanical work. If you are unsure as to your skill level as an airsmith we recommend that you seek professional advice or services from a qualified airsmith.

Required tools and spare parts

To fit this part you will require some or all of the following tools:
  • Dentists pick or similar
  • Q Tip and solvent / cleaning solution
  • 10mm size Spanner (For attachment of Q.E.V)
  • 5mm sized Spanner (For removal of nipple)
  • Weak thread locking compound

Removal of Part

  • If the Q.E.V is being used to replace a single nipple, carefully remove the current nipple with the 5mm spanner. If much resistance is met, DO NOT FORCE. There is a danger of rounding off the flat on a barb fitting as the metal is often quite soft. Instead, use a blow torch or heat gun to loosen the thread locking compound used to seal the barb. BE CAREFUL OF ANY SURROUNDING PLASTIC PARTS OR O RINGS when heating the barb.
  • Clean out the threaded hole into which the Q.E.V will be inserted. Be sure to remove any old thread lock compound, grease, oil etc using a solvent and a Q tip.

Installation of Part

  • Pour out a small amount of thread lock compound onto a disposable non-absorbent surface (such as some kitchen foil). Using the fine end of a pick or a needle, place a TINY amount of compound in a single stripe down an edge of the threads. Rotate the threads 180 degrees and add another TINY stripe.
  • Using the 10mm spanner, GENTLY screw the Q.E.V into position and the correct orientation. BEWARE that the threads are very small and consequently not very strong. Any attempt to over tighten the Q.E.V will result in stripping the threads, or more likely, the Q.E.V snapping and becoming irreparably damaged. If correct sealing methods are used then the parts need not be tightened hard.
  • Wait the specified curing time for the thread seal compound to set.
  • Push hosing onto barbed end of Q.E.V using soft jawed pliers


  • Be very careful when screwing in QEV's as the item is small and too much leverage (for example using a long spanner) can easily break them.