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the stern tube, the packing is compressed, creating a seal against the shaft. Creating a proper plunger alignment is critical for correct flow and a long wear life. Stuffing box components are of stainless steel, brass or other application-specific materials. Compression packing is rigorously tested to ensure effective sealing in valves, pumps, agitators, and other rotary equipment.
39:
A stuffing box of a sailing boat will have a stern tube that is slightly bigger than the prop shaft. It will also have packing nut threads or a gland nut. The packing is inside the gland nut and creates the seal. The shaft is wrapped by the packing and put in the gland nut. Through tightening it onto
126:
impregnated with wax and lubricants. A turn of the adjusting nut compresses the shaft packing. Ideally, the compression is just enough to make the seal both watertight when the shaft is stationary and drip slightly when the shaft is turning. The drip rate must be at once sufficient to lubricate and
109:. The "box" is a cylindrical assembly, typically of bronze, comprising a sleeve threaded on one end to accept adjusting and locking nuts. A special purpose heavy-duty rubber hose attaches the stuffing box to a stern tube, also called a shaft log, that projects inward from the hull. Marine-duty
117:
In a common type of stuffing box, rings of braided fiber, known as shaft packing or gland packing, form a seal between the shaft and the stuffing box. A traditional variety of shaft packing comprises a square cross-section rope made of
130:
There are improved shaft packing materials that aim to be drip-less when the shaft is turning as well as when stationary, also pack-less sealing systems that employ engineered materials such as carbon composites and
113:
secure the hose to the stern tube and the aft portion of the stuffing box sleeve. A sound stuffing box installation is critical to safety because failure can admit a catastrophic volume of water into the boat.
56:
or similar grease. The gland nut allows the packing material to be compressed to form a watertight seal and prevent water leaking up the shaft when the tap is turned on. The gland at the rotating shaft of a
101:, the shaft passes through a stuffing box, also called a "packing box" or "stern gland" in this application. The stuffing box prevents water from entering the boat's hull. In many small
155:, where the piston rod reciprocates through the cylinder cover, a stuffing box provided in the cylinder cover prevents the leakage of steam from the cylinder.
48:
A gland is a general type of stuffing box, used to seal a rotating or reciprocating shaft against a fluid. The most common example is in the head of a tap (
312:
27:
is an assembly which is used to house a gland seal. It is used to prevent leakage of fluid, such as water or steam, between sliding or turning parts of
76:
or fitting that connects a flexible electrical conduit to an enclosure, machine or bulkhead facilitates assembly and prevents liquid or gas ingress.
1027:
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65:
of a double acting steam piston is also known as a gland, particularly in marine applications. Likewise the shaft of a handpump or
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may be packed in a similar way and graphite grease used to accommodate continuous operation. The linear seal around the
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Other types of sealed connections without moving parts are also sometimes called glands; for example, a
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Step-by-Step
Instructions For Servicing Your Stuffing Box, by Capt. Vincent Daniello, August 16, 2012
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boats, for example, the stuffing box is mounted inboard near the point the shaft exits the
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A small boat stuffing box comprising an adjusting nut, a locking nut and a sleeve
28:
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cool the shaft and packing, but not so much as could sink an unattended boat.
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On a boat having an inboard motor that turns a shaft attached to an external
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52:) where the gland is usually packed with string which has been soaked in
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is sealed with a gland where the shaft exits the borehole.
215:. Washington: Taylor & Francis. pp. 333–334.
147:
A rod coming out of a stuffing box on a steam engine
263:. Camden, Maine: International Marine/McGraw-Hill.
239:", WindCheck Magazine, Retrieved April 27, 2016.
1254:
306:
261:Boatowner's mechanical and electrical manual
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299:
281:Servicing Your Stuffing Box, by Don Casey
142:
88:
1188:Glossary of steam locomotive components
1255:
294:
212:Pump Characteristics and Applications
208:
13:
1040:National Museum of Scotland engine
253:
14:
1294:
320:
274:
16:Assembly that houses a gland seal
1222:List of steam technology patents
138:
79:
1207:Murdoch's model steam carriage
1193:History of steam road vehicles
229:
202:
1:
1134:Murray's Hypocycloidal Engine
195:
34:
857:Return connecting rod engine
7:
781:Condensing steam locomotive
158:
10:
1299:
1088:"Coalbrookdale Locomotive"
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1151:
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1105:
1094:"Pen-y-Darren" locomotive
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1012:
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904:
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814:
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763:Single- and double-acting
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713:
665:
637:
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498:
426:
373:
364:
328:
933:Newcomen Memorial Engine
237:Stuffing Box Maintenance
175:Compression seal fitting
84:
43:
1237:Timeline of steam power
1232:Stationary steam engine
1115:Woolf's compound engine
1022:Soho Manufactory engine
877:Steeple compound engine
544:straight line mechanism
1242:Water-returning engine
1216:Lean's Engine Reporter
989:Chacewater Mine engine
862:Six-column beam engine
259:Calder, Nigel (2005).
209:Volk, Michael (2005).
148:
94:
1082:London Steam Carriage
243:June 2, 2016, at the
146:
92:
1028:Bradley Works engine
852:Reciprocating engine
675:Babcock & Wilcox
518:Centrifugal governor
569:Sun and planet gear
1273:Seals (mechanical)
1069:Richard Trevithick
667:Water-tube boilers
481:Gresley conjugated
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95:
1268:Marine propulsion
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1176:
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1055:
1054:
739:
738:
639:Fire-tube boilers
494:
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222:978-0-8247-2755-0
1290:
1200:fardier à vapeur
1034:Whitbread Engine
995:Smethwick Engine
963:
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721:Feedwater heater
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59:centrifugal pump
29:machine elements
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940:Fairbottom Bobs
925:Newcomen engine
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837:Expansion valve
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796:Watt's separate
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554:Parallel motion
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329:Operating cycle
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254:Further reading
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245:Wayback Machine
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180:Journal bearing
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135:(e.g. Teflon).
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1283:Piston engines
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190:Labyrinth seal
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1278:Steam engines
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139:Steam engines
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26:
25:gland package
22:
1227:Modern steam
1214:
1199:
1161:Porter-Allen
1140:
1074:
1001:
981:
938:
872:Safety valve
801:"Pickle-pot"
695:Thimble tube
260:
231:
211:
204:
153:steam engine
150:
129:
116:
96:
80:Applications
71:
47:
38:
24:
21:stuffing box
20:
18:
958:Watt engine
758:Oscillating
714:Boiler feed
559:Plate chain
538:Tusi couple
451:Walschaerts
336:Atmospheric
185:Journal box
111:hose clamps
74:cable gland
1257:Categories
1167:Ljungström
1153:High-speed
1046:Lap Engine
1002:Resolution
906:Precursors
791:Kirchweger
753:Locomotive
700:Three-drum
680:Field-tube
647:Locomotive
629:Lancashire
549:Link chain
533:Crankshaft
500:Mechanisms
428:Valve gear
196:References
103:fiberglass
63:piston rod
35:Components
1198:Cugnot's
1141:Salamanca
842:Hydrolock
827:Crosshead
773:Condenser
609:Egg-ended
99:propeller
67:wind pump
1181:See also
1107:Compound
982:Old Bess
822:Blowback
745:Cylinder
731:Injector
690:Stirling
685:Sentinel
599:Haystack
513:Cataract
486:Southern
476:Caprotti
351:Compound
241:Archived
159:See also
1263:Pistons
897:History
806:Surface
624:Cornish
584:Boilers
466:Corliss
403:Corliss
386:D slide
356:Uniflow
346:Cornish
165:Axlebox
1209:(1784)
1203:(1769)
1169:(1908)
1163:(1862)
1144:(1812)
1136:(1805)
1126:Murray
1117:(1803)
1096:(1804)
1090:(1803)
1084:(1803)
1078:(1801)
1048:(1788)
1042:(1786)
1036:(1785)
1030:(1783)
1024:(1782)
1005:(1781)
997:(1779)
991:(1778)
985:(1777)
977:(1768)
949:(1795)
943:(1760)
935:(1725)
916:(1698)
882:Stroke
847:Piston
832:Cutoff
705:Yarrow
657:Launch
652:Scotch
413:Sleeve
408:Poppet
393:Piston
374:Valves
366:Valves
267:
219:
54:tallow
50:faucet
815:Other
619:Flued
604:Wagon
528:Crank
471:Lentz
461:Baker
456:Allan
381:Slide
170:Bilge
151:In a
85:Boats
44:Gland
967:Beam
508:Beam
418:Bash
398:Drop
341:Watt
265:ISBN
217:ISBN
133:PTFE
124:hemp
120:flax
107:hull
786:Jet
614:Box
446:Joy
436:Gab
122:or
23:or
1259::
31:.
19:A
314:e
307:t
300:v
235:"
225:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
