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Diagnostics, Repairs, and Maintenance
Tank Vent Valves install in the top surface of the fuel tank are designed to control vapors generated during the diurnal cycle (daytime/nighttime expansion and contraction of fuel).
In older (non-vented fuel fill) installations, they may also direct excess tank vapors generated during the fueling process.
Vent lines from TVVs generally run to carbon canisters where any emitted fuel vapors are absorbed.
Properly installed, TVVs also help protect the carbon canisters from contact with liquid fuel.
Perko TVVs are sometimes referred to as "rollover valves" (since they offer rollover protection), and as "road grade vent valves".
They also include an overpressure relief feature.
These valves mount in the surface of the fuel tank.
Mounting options for tank mounted TVVs include flanged (for plastic tanks), threaded (for metal tanks) and swivel (for metal tanks).
Flanged valves match the SAE 5-bolt level sender flange (Required gasket is not included.)
Internally mounted versions are available for both plastic and metal tanks on a custom basis; please call 800-426-6930 for details
TVVs comply with the new CARB and EPA standards and meet the requirements of U.S.C.G. Safety Standards
Heavy on the technical side...
Vent orifice: 0.091"
Airflow Rate Positive Pressure @ 0°F: 3.5 kPa > 10 l/min and 10 kPa > 18.2 l/min
Airflow Rate Positive Pressure @ 180°F: 7 kPa < 0.2 l/min and 13 kPa > 1 l/min
Re-opening pressure > min. 7 kPa
Maximum fuel leakage: < 1.5 cc/min @ 6 kPa pressure
All returns must be authorized. Items returned prior authorization will not be accepted.
Defective new equipment may be returned for warranty repair/exchange to us within five (5) days of the shipment receipt date. After five (5) days, returns will be handled by direct contact and in accordance with the warranty terms of the item's manufacturer. Items that have malfunctioned due to mishandling, electrical overload, etc., will be subject to a repair charge.
Non-Defective new equipment will be authorized for return within five (5) days of the shipment receipt date if the equipment is still in new, re-sellable condition with the original manual(s), accessories, packing material and carton. We reserve the right to reject returns in which there is no original packaging, missing accessories, damage or visible signs of usage of the item. A restocking fee of up to 25% of purchase price may apply. Special orders and dangerous goods are non-returnable.
**There's a 20% Restocking Fee on All Returned Palmgren Products in Original Packaging
To get your RMA, simply call (800) 364-4637 for a return authorization number or email sales@palmerpower.com .
(Do not write anything on the manufacturer's original package or use as a shipping carton. Include all accessories, manuals and warranties.) Please include a copy of the packing list or invoice with a reason for the return. Your return authorization number is valid for thirty days.
To check the status of your return, please email us at sales@palmerpower.com. Please be sure to include your RMA number. For more information please check our FAQ page.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
We will service your boat whether you bought it from us or not. Our award-winning boat service department has a full-time staff of seasoned, factory-certified technicians dedicated to ensuring that your boat runs well for years to come. Our team is trained to correctly diagnose issues, advise you of any developing problems, and address any unique service issues your boat may require. Whether you need complex engine work and repairs, canvas and upholstery, boat tune Up, electronics installation or repair, or boat detailing, our technicians will work quickly to keep you out of the shop and on the water. Not only does our service department provide the highest quality service, we also have a large parts department for the do-it-yourself types. Ask about our inventory of parts and aftermarket additions to make your own repairs or upgrades.
All returns must be authorized. Items returned prior authorization will not be accepted. International customers must ship any returns to us freight and duty prepaid. Return freight charges for International shipments will be the responsibility of the customer.
Defective new equipment may be returned for warranty repair/exchange to us within five (5) days of the shipment receipt date. After five (5) days, returns will be handled by direct contact and in accordance with the warranty terms of the item's manufacturer. Items that have malfunctioned due to mishandling, electrical overload, etc., will be subject to a repair charge.
Non-Defective new equipment will be authorized for return within five (5) days of the shipment receipt date if the equipment is still in new, re-sellable condition with the original manual(s), accessories, packing material and carton. We reserve the right to reject returns in which there is no original packaging, missing accessories, damage or visible signs of usage of the item. A restocking fee of up to 25% of purchase price may apply. Special orders and dangerous goods are non-returnable.
(Do not write anything on the manufacturer's original package or use as a shipping carton. Include all accessories, manuals and warranties.) Please include a copy of the packing list or invoice with a reason for the return. Your return authorization number is valid for thirty days.Palmer Power accepts a variety of payment options for your convenience. For prepayment, we accept all major credit cards (Visa, MasterCard, Discover and American Express), Purchase Orders, and international wire transfers. We also offer credit terms to existing customers.