990 series dual action breather valve
The 990 Breather Valve is primarily used in the container industry and for transportation cases and other military, industrial and medical applications.
The 990 is an automatic dual action valve that utilizes the coaxial movement of pressure and vacuum poppets to maximize reliability, efficiency and flow in any position or hostile environment.
The 990 valve may be clamped in a 1.05 inch (26.7 mm) hole or screwed in a 1 inch (25.4 mm) 14 UN-2B straight pipe thread hole.
Features & benefits
Higher flow at lower pressure differentials
Manual override button for quick relief
Corrosion resistant materials
Compact and lightweight: approximate weight 1.5 ounces (43 grams)
Individually calibrated and tested
Self-aligning poppet allows for repeatable cracking and reseating.
Available coatings: Black anodized or clear anodized standard; EMI/RFI coating available
Specifications & technical information
Body, stem, nut, clamp and washer: Anodized aluminum
Retaining ring: Stainless steel
Spring: Stainless steel
Cracking pressure ±15% nominal
Reseat within 20% of nominal
Standard pressure and vacuum settings:
0.1 to 3.0 psig
Other settings available on request (minimum orders apply)