How To Guides
- How to undertake a professional quality repair of your PVC or Hypalon RIB, inflatable boat and SIB tubes
- How to clean inflatable boats, protect RIB collars, tubes and sponsons, clean Hypalon and PVC inflatable boat fabric
- How to find a leak in my inflatable boat, RIB, dinghy, life raft or inflatable kayak collar or tubes
- How to fit a replacement screw-in type inflatable boat, rigid inflatable boat (RIB) or dinghy inflation deflation valve
- How to fix or glue inflatable boat PVC fabric patches and accessories to Hypalon fabric RIB collars and tubes (and vice versa)
- How to identify the fabric of your RIB, inflatable boat, dinghy, life raft or inflatable kayak collar, tube or sponson. Hypalon or PVC?
- How to repair inflatable boat, RIB, RHIB, SIB and kayak collars, inflation tubes or sponsons
- How to replace a Leafield Marine A4 inflation/deflation valve older inflatable boats, RIBs, RHIBs and dinghies
- How to replace an inflatable boat valve
- How to service and/or fit a replacement diaphragm to the Alfons Haar type SF1 inflation valve
- How to service or repair the Leafield Marine A7 or B7 inflatable boat valve
- How to service or repair the Leafield Marine C7 inflatable boat valve
RIBs & Inflatable Boats
Safety Data Sheets
How to service and/or fit a replacement diaphragm to the Alfons Haar type SF1 inflation valve
The Alfons Haar SF1 is a high quality, high performance RIB inflatable boat inflation deflation valve that is fitted to the RNLI’s Atlantic Class RIB inshore lifeboats and other military and high-level commercial specification boats.
The SF1 valve is simple to maintain and service and ribstore are able to supply both complete SF1 valves and service diaphragm kits – visit https://www.ribstore.co.uk/
Servicing the Alfons Haar SF1 Inflation Valve
Remove the cap. Deflate the tube or collar by twisting the brass diaphragm spindle anti-clockwise a ¼ turn and depress the spindle down until it is in the locked open position. Remove and keep safe the black rubber seal (do not unscrew the upper valve body as the lower valve body may be lost inside the collar/tube).
Using a pair of circlip pliers, remove the large gold coloured circlip from the body of the valve. Slide the complete spindle/diaphragm assembly up and out from inside the valve body.
Inspect the rubber diaphragm for any damage, dirt and/or grit, or for any hardening of the rubber that prevents a good seating of the valve. Ensure that the spindle is in the closed valve position and depress the brass spindle to check the free operation of the spring. Inspect for any damage of the brass spindle, spring and plastic fittings. If any damage or failure to freely operate, replace the diaphragm assembly (service kit available at https://www.ribstore.co.uk/). Otherwise clean the diaphragm assembly with soapy water and when dry reassemble the valve. Ensure that the spindle is in the closed position before re-inflating and replacing the cap.
View & Download a PDF Version of this Guide HOW TO service a Alfons Haar SF1 inflation valve