Pressure Vacuum Vent Valve for Gas Station

Pressure Vacuum Vents are installed on the top of vent pipes from underground or above ground 
fuel storage tanks.The vent cap and internal wire screen are designed to protect the tank vent 
lines against intrusion and blockage from water, debris or insects. A normally closed poppet in the 
valve opens at a predetermined pressure or vacuum setting to allow the tank to vent.
Features
1. Pressure/Vacuum Setting - 2.5" to 6" water column pressure settings and -6" to 10" water column
 vacuum settings are factory preset and tested.
2. Reliable Service - Cycle tested to the equivalent of 80 years of service in the most severe environment 
without leakage problems.  
3. Corrosion-Resistant Construction - high quality assures a long service life.
4. Easy Installation - The 404 is available in 1.5" and 2" threaded versions.
5. Complies with NFPA 30 Requirements - for venting gasoline vapors upward.
6. Manifold Vent Pipes - Vent pipes may be manifolded to produce a single Pressure Vacuum Vent line.
7. High Maximum Flow Rate - 6450 SCFH at 2 psi pressure drop.
8. Leak Rate - Multiple pressure vacuum vents may be installed on a single site. 
9. Maintenance - No tools required. A removable snap fit top allows for easy maintenance (recommended yearly).
10. 100-Mesh Stainless Steel Wire Screens - Helps prevent debris and insects from entering the 
tank vent lines. An added screen installed at the base prevents debris from intruding from the vent stack.
11. Adaptor Bushing - Removable Hex threaded bushing designed for easy installation on NPT threaded risers. Allows easy access
 to lower screen.




FAQ
Q1: Are you a factory?
A:We are one of the leading China factory professional produce of fuel tanker parts, fuel nozzle, fuel dispenser and fuel station parts.Which covers 80,000me and with independent D&R ability, and we can offer OEM and ODM service.
 
Q2: What are the application fields of your products?
A: Desheng Petrol Machine mainly products including fuel tanker parts, fuel nozzle, fuel dispenser and fuel station parts etc.
 
Q3: What is your terms of packing?
A: We pack our goods in standard export carton box, other packing type can do as required.
 
Q4: How about your delivery time?
A: 5-7 days for samples; 20-35 days for batch goods after received payment.
 
Q5: Do you test all your goods before delivery?
A: Yes, we have 100% test before delivery.
Q6: What about the shipping package?
A: Package will use standard export carton, can do pallets as customized.
 
Q7: What is your sample policy?
A: We can supply the sample, but the customers have to pay the sample and freight.
 
Q8: How do you make our business long-term and good relationship?
A: We keep good quality and competitive price to ensure our customers benefit . We respect every customer and we sincerely do business with everyone.