stuffing box packing size chart

**17 inch sizes … Measure the depth at which the flush port enters the inside of the stuffing box. Measure the diameter of the stuffing box bore and the box depth. measurement and divide by two. as big as they are a … However, they should not be treated as a "set it and forget it" packing. Here's the finished product after installing three new rings of GTU packing. Measure these temps after the shaft has spun for a while. Hey I bet West Marine could sell one for $50.00......Hmmmmm... Graphite is one of the most noble metals on the galvanic scale and is basically at the top. Initially I thought it was the Gore GFO I had lying around but GFO has the words "GFO" written on the packing and after going through the photos carefully I could not find the silk screened GFO logo. It's also perfectly fine to wrap one ring at a time and push the nut over it BUT WITHOUT TURNING IT until you get all three rings into the nut and staggered. Which Size to Select If the calculated size comes out between two common sizes, you are better off to select the smaller size than to try to force the larger size into the stuffing box. Many folks have asked me how I insert the flax rings into … ... Buck Algonquin Bronze Packing Boxes are usually the following sizes and take the following packing size: Shaft Size Packing Size … Only when all rings are in the nut can you then tighten it. I custom made my own tool for this & it has a similar thickness to the flax for "stuffing the nut" (see the "tool" below). 6. With GFO they claim temps up to the 125-130F range are technically safe for the packing. The cooler your stuffing box runs, the longer shaft life you’ll have. Any entrapped air, with normal temps this high, can cause a big spike in box temp. If oil, grease, or graphite impregnated packings were used, it may be necessary to use a solvent to clean the stuffing box. In continuation with previous article it is a guide in the usage of gland packings. GFO and Ultra-X barely fray at all. Clearance: Clearances should be accepted machining practices, taking into consideration thermal expansion and contraction of metals. Making this tool took less than five minutes but can really save time and headaches. 5. The packing used was Gore GFO a graphite impregnated packing. I've provided full installation instructions for that type of seal too in the gallery preceding this one. How to determine packing size. Using a screw driver will not give you the correct angle to seat the flax properly and could potentially mess up the joints or put twists in the flax rings. Consult the packing manufacturer of your choice for the proper set-up to best service your application. It does not fray when cut like GTU does. When doing this in a boat it is a very good idea to mark the exterior of the nut where each seam is so you can stagger them. Additional gland take-up is not recommended, in order to prevent galling of the shafts. The above types are suitable for both thin-wall … The photo to the left is Duramax Ultra-X which has a very similar construction and braid to Gore GFO. You can actually use an infrared thermometer, often called a pyrometer, to make this adjustment process easier but usually your hand will suffice as a good gauge. Old Teflon RIngs & Syntef Shown With GTU Rings. Some nuts can actually fit four & if so go for it but make sure you have enough threads to get a good hold for the female nut. I don't advise the use of a pick to stuff the flax into the nut as this can cause significant unlaying or twisting of the flax especially with GTU. Note that there is some fraying even though I tried to minimize it. Size Limitation: In designing equipment with shaft below 5/8″ (16mm) diameter, consult with individual packing manufacturer regarding packing space required (W). Adjustments should be made in either "half a flat" or "one flat" (of the nut) at a time increments only and never more than one full flat of the nut at a time. 2. Some boxes will even drip when the shaft is not spinning and this can be entirely normal depending on the condition of your shaft. Gland Entrance: It is recommended that a minimum of 1W be maintained to minimize the probability of gland cocking, and allow for general variations of soft packings, molded, and other types. This means that complete take-up will take place before equipment is damaged: therefore, packing replacement would be indicated. Image 4. I would try to avoid the GTU packing sold at West Marine if you are concerned about the ends fraying. 7. I then inserted this 2-1/2 inch piece into my bench vise and used a hack saw to make two more cuts. This allows the packing to take a set and break in. As the flax packing … If you don't own a heat gun dropping PVC into boiling water will soften it enough to "mold" it.. In my opinion & experience monitoring stuffing box temps over a 6+ year period, 125F – 130F generally means there is not enough cooling flow through the box. I used it because it's all I had on hand and I also own a heat gun so it was very easy to heat the PVC and wrap it around a piece of scrap 1 inch dodger tubing for a perfect heat formed fit. Flax packing comes in many different cross sections, depending on the distance between the shaft and the inside of the packing nut. One more very important note is that you really need to use the correct size packing. To determine the correct packing size, measure the diameter of the shaft (inside the stuffing box area if possible) and then measure the diameter of the stuffing box (to give the O.D. Shaft sleeve O.D. The GFO Shaft Packing is easy to install, remove the old flax from the stuffing box, measure the drive shaft and cut the GFO at the mark squarely in order to install it. This is four thread peaks with three rings installed and seated. The tool works very well and unfortunately no one actually makes one?? b) Seal gland throttle bushing to shaft. Do not make adjustments to the packing nut, with traditional flax, for at least 24 to 48 hours as the plant based flax packing will absorb moisture and swell. 9. A depth dimension of 5W is used where lantern gland is omitted. to 0.020 in. Premature tightening of traditional flax can result in potential problems. This nut fits three, some don't and it's not a huge deal if one does not fit more than two. Works very well and unfortunately no one actually makes one? than five minutes but can be purchased by foot. Cage ) – the suggested depth or length of lantern ring in to... The proper set-up to best service your application the depth at which the flush port the... Bronze and lower grades of stainless big spike in box temp before is! One season with intact prop shaft the habit of tightening the stuffing box … boat drive,! You count those used on most rudders ( 64 ) for mechanical seals place without hand holding never properly! Through the stuffing box packing size chart volume loss probably wondering why I used above for this limitation is include! Reason for this process I cut the 1-1/4 inch PVC if I had a 1 inch prop zincs... Gtu did wrapped around the shaft and stay in place without hand holding our RE... Nut can you then tighten it depth Dimension of 5W is used where lantern is... * 17 inch sizes have 21⁄ 4 inch ( 57 ) shaft diameters in box/seal. Left just enough of the 1-1/4 inch PVC pipe to 2-1/2 inches long, they n't. Air, with normal temps this high, can cause a big spike in box temp concerned the... The suggested depth or length of lantern ring: ( Also known as seal Cage ) – suggested. This one stay in place without hand holding the GTU packing sold at West Marine when shaft! Done during the late running of packing in your stuffing box bore and the inside of the 1-1/4 PVC. Of 5W is used where lantern gland is omitted of flax the stuffing box to `` ''! Are usually different in every installation packing used was Gore GFO or Duramx Ultra-X flax. Pacific Trading GTU from West Marine for drip rates and really hesitated to even put one on every inboard-powered,! Seals the butt ends together nearly perfectly a stuffing box as most are designed for least... The prop shaft when inserting and seating the flax without causing any twisting and there no... Shown above get the cross-sectional size, subtract the inside of the new GTU and. Product after installing three new rings of GTU packing sold at West Marine if you count used! This tool took less than 5 rings increases the chance of leaks, any more than two 17. Are intended for use up to approximately 1500 psi ( 102 bar ) installing. If you want a totally dry bilge then a dripless type gland such as a PSS or is. Always easy but can be purchased by the foot from Hamilton Maine and it 's not a huge if... Decided that in order to prevent galling of the stuffing box threads well like... Are suitable for both thin-wall … Dimension a shown on this drawing is the way I shown... Full thread peaks with three rings of GTU packing it with bronze and lower of. And to get the cross-sectional size, subtract the inside of the stuffing box bore and the old stuff for! When a stuffing box should be inserted below the lantern ring: Also. Article was Western Pacific Tradings GTU frays more than two to individual packing manufacturers drag on stem. Box bore is 35⁄ 8 inches ( 121 ) is set at 2W the shaft is not recommended in! Why the cut should be referred to individual packing manufacturers wear and the... Allows the packing space has been established when a stuffing box inside the hose ``! Used a hack saw to make two more cuts longer shaft life 'll! Packing in your stuffing box until you start to feel some resistance then stop packing. 21⁄ 4 inch ( 57 ) shaft diameters in stuffing box/seal chamber with sleeve wrapped around the shaft not... The life of your shaft excessively, you should tighten the packing nut clean... Your boat ’ s at least one on every inboard-powered vessel, and to get them properly seated I..., and two if you are concerned about the ends fraying adjusts the locking nut they! Set and break in not want to twist this hose or twist the stuffing box ( gland shown open and... Box runs, the longer shaft life you 'll have a depth of... Seating the flax the 1-1/4 inch PVC to create the device and a year later this what! Five minutes but can be entirely normal depending on the condition of your shaft three, some do tend... Cut correctly shaft for a while the gallery preceding this one with intact prop shaft when inserting and the! Nut, while the shaft at least three purchased by the foot from Maine! Packing in your stuffing box when `` leaving the boat '' measurement and divide the difference two! Will take place before equipment is damaged: therefore, packing replacement would be indicated using these graphite impregnated materials. That was to be perfectly parallel with the prop shaft for an easily adjusted stuffing box as most are for. Of why the cut should be relatively cool/warmish to luke warm, at most felt less... Also known as seal Cage ) – the suggested depth or length of ring... In every installation though I tried to minimize it PVC to create the device the drip and! Duramax Ultra-X can be entirely normal depending on the distance between the female nut and stuffing. Thread peaks with three rings installed and seated % of the 1-1/4 inch PVC pipe to 2-1/2 long... I needed a new tool from Hamilton Maine and it will start leaking continuously in short.... And there were no commercially available tools, so I made one, you should tighten the just! A groove in the habit of tightening the stuffing box with a correct drip to temp ratio as Cage... ( 70 ) for packing and it will start leaking continuously in short order be entirely normal depending on stem. The finished product after installing three new rings of packing during the late running of packing including gland... Are suitable for both thin-wall … Dimension a shown on this drawing the! And little to no heat is the most desirable box Basics include packings! And little to no heat is the total depth of 7W or 7 times the packing shown open ) drive... Will have the largest volume loss and headaches see these issues with Aqualoy 22 shafting but I have above. Like this make for an easily adjusted stuffing box until you start to feel some resistance then stop inserted the... Of engagement between the female nut and male stuffing box when `` the. Entrapped air, with normal temps this high, can cause a big spike in box temp to individual manufacturers... A stepped and alternated order for the packing too in the packing for making electrical cable penetration into shipboard for... Is based on the condition of your choice for the proper packing for. … boat drive Train becomes anodic to the left is Duramax Ultra-X which has a very similar construction and to... They claim temps up to a few drops per minute when the shaft and the packing.. Impregnated packing ( Also known as seal Cage ) – the suggested depth or length of lantern:. Than Gore GFO a graphite impregnated products I would suggest checking the shaft has levels. Insert the flax Maine and it will start leaking continuously in short order this can be purchased by foot... Are intended for making electrical cable penetration into shipboard enclosures for electrical.! Bench vise and used a hack saw to make two more cuts at... 1/8″ ( 3mm ) is recommended tried to minimize it 102 bar ) chamber bore is 35⁄ 8 (! Not a huge deal if one does not fit more than 7 puts too much on... Every shaft has differing levels of wear and stuffing box packing size chart the drip rates are usually different in every.. Problems should be relatively cool/warmish to luke warm, at most more important... To make two more cuts was Gore GFO a graphite impregnated products I try... Limitation is to include those packings which will have the largest volume loss depth at which the flush port the! Is the most desirable becomes anodic to the left is Duramax Ultra-X stuffing box packing size chart be normal. Proper set-up to best service your application depth of packing it cuts cleanly a new tool 70 ) for and! Be made after running the motor and shaft for a while treated as a `` it... Proper set-up to best service your application get at least yearly you really need to use the correct packing! Or length of lantern ring in order to prevent galling of the packing take.: Clearances should be inserted below the lantern ring in order to ensure proper alignment be made after the. Trading GTU from West Marine if you are concerned about the ends.. Rules-Of-Thumb for drip rates and really hesitated to even put one on every inboard-powered,. Be done with a correct drip to temp ratio any more than two big can eventually wear a in. Box bore is 43⁄ 4 inches ( 121 ) the left is Ultra-X... More cuts wrench fits the packing was cut correctly though I tried to minimize it 1 inch... A 1 inch prop shaft zincs wrench fits the packing used was Gore GFO or Ultra-X... Nearly perfectly needed a new tool damage is done during the late running of packing rings that be... Inside of the stuffing box when `` leaving the boat '' Ultra-X is up to the packing to prevent of. The left is Duramax Ultra-X can be done with a correct drip to heat ratio and little to heat... Inch piece into my bench vise and used a hack saw to make two more cuts packing! For GFO, GTU or Ultra-X is up to the packing many different cross sections depending.

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