The Gast SSP-87R6-02 Biased Valve Kit 87R at Kinequip is a silencer upgrade kit featuring Gast’s exclusive Sound Shield™ technology, designed for all 87R twin cylinder rocking piston models with a biased relief valve used in pressure applications. This innovative system reduces sound levels by up to 25% dB(A) and decreases perceived loudness by 40% Sones at open flow—without compromising performance.
To confirm if your 87R model uses a biased relief valve, check the part number: if it includes an “R” (e.g., 87R642-101R-N470X), this is the correct kit. If not, use the SSP-87R6-01 instead. Still not sure? Contact us!
Request a quote for Gast SSP-87R6-02 Biased Valve Kit 87R from Kinequip today!
Quick Product Highlights:
- For 87R twin cylinder models with biased relief valve
- Features Sound Shield™ for up to 25% dB(A) and 40% Sone reduction
- Maintains full pump performance
- Integrated solution—no need for external mufflers or insulation
- Easy installation on-site or during manufacturing
- Includes:
- (2) attenuation chambers with internal silencers
- (1) valve plate with (2) custom O-rings and (2) circular O-rings
- (6) port plugs
- Installation guide
- AS321 silencers should be replaced every 2000 hours or 2 years





