{"id":6361,"date":"2026-10-14T05:26:43","date_gmt":"2026-10-14T05:26:43","guid":{"rendered":"https:\/\/www.henghuahose.com\/?p=6361"},"modified":"2026-10-14T05:26:45","modified_gmt":"2026-10-14T05:26:45","slug":"camlock-fittings-for-chemical-hose","status":"publish","type":"post","link":"https:\/\/www.henghuahose.com\/es\/camlock-fittings-for-chemical-hose\/","title":{"rendered":"Camlock (Cam and Groove) Fittings for Chemical Hose"},"content":{"rendered":"

A pair of camlock fittings joins two ends by seating a grooved adapter inside a grooved coupler, then folding two cam levers down to lock the joint. Chemical transfer crews reach for camlock fittings when a hose must connect and disconnect quickly without tools. These couplings, also known as cam and groove couplings, cover the common chemical transfer bores and accept several body materials. This article maps the type family, explains how the cam-lever seal works, and shows which body mates with a hose tail, a threaded port, or a flange.<\/p>\n\n\n\n

What Are Camlock Fittings on a Chemical Hose?<\/h2>\n\n\n\n

A camlock coupling is a quick-connect hose fitting built around one moving part, the cam lever. The camlock adapter carries an external groove. The coupler carries a gasket and two levers with internal cams. Pushing the adapter into the coupler and folding the levers down wedges the adapter against the gasket and holds the joint closed.<\/p>\n\n\n\n

The US federal specification that governs these products is A-A-59326, which replaced MIL-C-27487; it fixes the basic geometry and the letter codes that buyers use every day. Common camlock sizes run from 1\/2 in up to 8 in, which covers chemical hose sizes from a 3\/4 in laboratory line to a 4 in tank transfer line. The European counterpart, EN 14420-7:2022, covers cam locking couplings for liquids, solids, and gases. Liquefied gas and steam sit outside the EN 14420-7 scope.<\/p>\n\n\n\n

For a plant, the value of a camlock connection is speed. An operator can break the joint with one hand and no wrench, which matters during a drum change or a tanker hookup. The same lever that saves time also demands discipline, so the gasket and the safety pin deserve a second look before every transfer. For the wider family of hose hardware, the guide to couplings and their selection criteria<\/a> places camlock fittings beside the other connection styles.<\/p>\n\n\n\n

The fitting is only one link in the line. The hose carries the media, the coupling joins the ends, and the gasket keeps the product inside. A body that matches the bore and the thread will still leak through a tired seal, so treat the whole joint as one unit during selection.<\/p>\n\n\n\n

How Does the Cam and Groove Cam-Lever Seal the Joint?<\/h2>\n\n\n\n

The seal in a cam and groove coupling depends on three parts working together: the adapter groove, the coupler gasket, and the cam lever. When the lever closes, its internal cam rides into the adapter groove and pulls the adapter forward. That forward travel compresses the gasket against the adapter face and stops the leak.<\/p>\n\n\n\n

The gasket does the sealing, and the cam does the clamping. This split matters, because a worn gasket leaks even when the levers feel tight. A stretched groove or a bent lever also lets the adapter shift under pressure. Inspect both surfaces together rather than trusting the lever feel alone.<\/p>\n\n\n\n

\"Cutaway<\/figure>\n\n\n\n

Figure 1. The cam lever pulls the adapter groove forward and presses the coupler gasket against the adapter face.<\/p>\n\n\n\n

The catalog-standard body carries a single seal, so one gasket protects the whole joint. A few heavy-duty bodies add a second seal for low-pressure vacuum duty, but a catalog body usually holds one. Keep a spare gasket on the truck, because a leaking gasket is a frequent field failure. A chemical hose camlock is only as tight as the seal inside it.<\/p>\n\n\n\n

Field checks on the coupling are quick. Look for a flattened or shiny groove, because both point to wear. Look for a gasket that sits below the coupler rim, because it may be the wrong thickness. Look for a lever that moves with no resistance, because the cam may have lost its bite.<\/p>\n\n\n\n

Camlock Fittings Type Map: A Through F, DC, and DP<\/h2>\n\n\n\n

The type letters describe the two ends of one body. For types A through F, one end is the camlock half, a grooved male adapter or a grooved female coupler. The other end is whatever the job needs, such as a hose tail, a male thread, or a female thread. Read the letter as a pair of ends, and ordering gets simple.<\/p>\n\n\n\n

The main camlock coupling types fall into the basic six plus two closures. Types A, B, C, D, E, and F carry the working connection. Type DC is a dust cap, and type DP is a dust plug, and both exist to close an open end. The table below maps each body in the camlock fittings family to its two ends.<\/p>\n\n\n\n

Table 1. The camlock type map, from the basic six bodies to the two closures.<\/p>\n\n\n\n

Type<\/th>Body form<\/th>Other end<\/th>Job on a chemical line<\/th><\/tr><\/thead>
Type A<\/th>Male adapter<\/td>Female thread<\/td>Threads onto a port and presents an adapter to a coupler.<\/td><\/tr>
Type B<\/th>Female coupler<\/td>Male thread<\/td>Screws into a threaded port and receives an adapter.<\/td><\/tr>
Type C<\/th>Female coupler<\/td>Hose tail<\/td>Clamps to a chemical hose and receives an adapter.<\/td><\/tr>
Type D<\/th>Female coupler<\/td>Female thread<\/td>Mounts on a threaded stub and receives an adapter.<\/td><\/tr>
Type E<\/th>Male adapter<\/td>Hose tail<\/td>Clamps to a chemical hose and plugs into a coupler.<\/td><\/tr>
Type F<\/th>Male adapter<\/td>Male thread<\/td>Screws into a threaded port and presents an adapter.<\/td><\/tr>
Type DC<\/th>Dust cap<\/td>Closed<\/td>Covers a male adapter while the line is open.<\/td><\/tr>
Type DP<\/th>Dust plug<\/td>Closed<\/td>Plugs a female coupler while the line is open.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\"Chart<\/figure>\n\n\n\n

Figure 2. The camlock type map: Types A to F carry the connection, while DC and DP close an open end.<\/p>\n\n\n\n

Two camlock coupling types share the same coupler half, and two share the same adapter half. That pattern is why a single spare coupler can serve several lines. Learn the ends rather than the letters alone, and the map stays useful on the floor.<\/p>\n\n\n\n

Which Camlock Fittings Mate with Which End?<\/h2>\n\n\n\n

Start from the end you already have, then pick the body that meets it. A hose with a shank or tail takes a Type C or Type E body, because the camlock hose barb clamps into the hose. A female threaded port takes a Type B or Type F camlock, because both carry a male thread. A male threaded port takes a Type A or Type D body, whose female thread accepts the stub.<\/p>\n\n\n\n

Flange ends need their own note. Some camlock bodies come with a fixed or floating flange instead of a thread, and that flange must match the pipe system in use. A flange drilled for the PN system follows EN 1092-1, while a flange drilled for the Class system follows ASME B16.5. Mix the two, and the bolt holes refuse to line up.<\/p>\n\n\n\n

Match the camlock coupling types to the port in front of you rather than to a part number you remember. A body that fits the thread but not the media will still fail in service. Check the thread, the flange face, and the gasket in the same pass, and record what you fitted.<\/p>\n\n\n\n

Table 2. Choosing a camlock body from the end that is already on the equipment.<\/p>\n\n\n\n

End already fitted<\/th>Body to choose<\/th>Motivo<\/th><\/tr><\/thead>
Hose shank or tail<\/th>Type C or Type E<\/td>The tail clamps into the hose bore.<\/td><\/tr>
Female threaded port<\/th>Type B or Type F<\/td>Both carry a male thread; the end you need to present decides.<\/td><\/tr>
Male threaded port<\/th>Type A or Type D<\/td>The female thread accepts the male stub.<\/td><\/tr>
Fixed or floating flange<\/th>Flanged camlock body<\/td>The flange face must match the pipe system.<\/td><\/tr>
Open adapter to protect<\/th>Type DC dust cap<\/td>The cap covers the adapter groove.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Gaskets, Safety Pins, and Lever Practice<\/h2>\n\n\n\n

On a chemical hose camlock, the gasket is the part that touches the product, so its material has to suit the media. A PTFE envelope gasket suits broad chemical service and aggressive media. An EPDM gasket suits water, dilute acids, and some alkalis. An FKM gasket suits oils, fuels, and many solvents. Choose by media first, then by temperature.<\/p>\n\n\n\n

A camlock safety pin is small and easy to lose. A pin through the lever stops the cam from lifting if the line is dragged or vibrated. Replace a missing pin rather than trusting the spring tension of the lever. On a chemical line, a lever that lifts under pressure can release product and expose the crew.<\/p>\n\n\n\n

Gasket life depends on the media and the cleaning routine, so inspect at each change-out. A gasket that swells, cracks, or hardens has to go. Keep the spares bag labeled by material, because a wrong gasket is easy to fit and hard to spot until the line leaks. For the hose side of the assembly, the complete guide to chemical hose<\/a> covers liner choice in more depth.<\/p>\n\n\n\n

Table 3. Camlock gasket choices by media and temperature.<\/p>\n\n\n\n

Gasket<\/th>Typical media<\/th>Check points<\/th><\/tr><\/thead>
PTFE envelope<\/th>Broad chemical service and aggressive media<\/td>A firm lever push helps seat a stiff seal.<\/td><\/tr>
EPDM<\/th>Water, dilute acids, and some alkalis<\/td>Use FKM for oils and fuels.<\/td><\/tr>
FKM<\/th>Oils, fuels, and many solvents<\/td>Confirm hot caustic service before use.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Storage matters as much as selection. Keep couplings capped or plugged so grit stays out of the grooves. Store gaskets away from sunlight and heat, because both age the elastomer. Label the shelf by material and size, and the next change-out stays quick.<\/p>\n\n\n\n

How Should Camlock Fittings Be Assembled and Rotated?<\/h2>\n\n\n\n

Correct assembly is a short routine, and it starts before the lever moves. Clean the adapter groove and the coupler seat, then check that the gasket sits flat. Push the adapter fully into the coupler. Fold both levers down until they lie flat against the body, and finish by inserting the safety pin.<\/p>\n\n\n\n

Rotation direction is simple once you picture the cam. Each lever turns down and outward toward the coupler body. Never force a lever that binds, because the cause is usually visible before the lever is closed. If a lever will not lie flat, stop and reopen the joint.<\/p>\n\n\n\n

Work through the same checks before every transfer, and treat the order as fixed. Grit left in the groove stops the levers from lying flat, and a pin left out after a wash-down lets the cam lift on a dragged line. Check both before the pump starts.<\/p>\n\n\n\n

Table 4. Assembly checks for a camlock connection.<\/p>\n\n\n\n

Step<\/th>Check<\/th>Warning sign<\/th><\/tr><\/thead>
Clean<\/th>Adapter groove and coupler seat are clear<\/td>The lever binds before it lies flat.<\/td><\/tr>
Seat<\/th>The gasket sits flat in the coupler<\/td>Product weeps at first pressure.<\/td><\/tr>
Close<\/th>Both levers fold flat on the body<\/td>One lever springs back open.<\/td><\/tr>
Pin<\/th>The safety pin passes through the lever<\/td>A missing pin after a transfer.<\/td><\/tr>
Orient<\/th>Levers point away from the flow path<\/td>A lever snagged on nearby hardware.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\"Hands<\/figure>\n\n\n\n

Figure 3. Each cam lever folds down and outward until it lies flat against the coupler body.<\/p>\n\n\n\n

Matching Camlock Fittings to Chemical Hose and Standards<\/h2>\n\n\n\n

The hose end of a camlock body is usually a hose tail, and the tail has to match the hose bore and the media. A chemical hose built to EN 12115:2021 comes as Type D for delivery or Type SD for suction and delivery, and the chemical hose camlock tail clamps onto either type. The EN 12115 letters describe the hose grade; the camlock body letters describe the end. The tail barb should match the hose bore, because an undersized tail invites a leak at the clamp.<\/p>\n\n\n\n

Testing follows the hose as much as the coupling. Hose makers test assemblies with ISO 1402 for hydrostatic strength, ISO 6803 for impulse, and ISO 4649 for abrasion resistance. These same tests appear on a good assembly record, and they tell you whether the hose and the coupling were proved together. Our chemical hose range lists bores that match common camlock tails.<\/p>\n\n\n\n

Pressure and temperature limits come from the camlock side. EN 14420-7 sets a working range of -0.8 bar to 16 bar and -20 \u00b0C to +65 \u00b0C for cam locking couplings. Burst pressure for a rubber and textile chemical hose is usually taken as three to four times the working pressure as a planning figure. Bore and body material then trim the limit, because pressure capability typically decreases with bore size and drops further with a plastic body. The table below collects the reference values.<\/p>\n\n\n\n

Table 5. Camlock pressure and temperature reference values, and how bore and body change capability.<\/p>\n\n\n\n

Art\u00edculo<\/th>Reference value or behavior<\/th>Note<\/th><\/tr><\/thead>
Presi\u00f3n de trabajo<\/th>-0.8 bar to 16 bar<\/td>Value from EN 14420-7.<\/td><\/tr>
Working temperature<\/th>-20 \u00b0C to +65 \u00b0C<\/td>Value from EN 14420-7.<\/td><\/tr>
Bores<\/th>1\/2 in to 8 in<\/td>Range from A-A-59326.<\/td><\/tr>
Metal body, small bore<\/th>Highest pressure capability of the listed body forms<\/td>Planning figure; confirm the bore rating.<\/td><\/tr>
Metal body, large bore<\/th>Capability typically decreases with bore size<\/td>Planning figure; confirm the derating curve.<\/td><\/tr>
Plastic body<\/th>Lower than an equal-bore metal body<\/td>Planning figure; confirm by body material.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Body material changes the media limits, so keep this pointer short. Aluminum suits light duty, and strong alkalis or some strong acids need a polypropylene camlock or a stainless camlock instead. Stainless steel 316 covers a broad chemical range but carries a pitting risk in chlorides. Polypropylene handles a wide acid and base range at lower pressure and temperature. For a full comparison, read the planned coupling material guide, the hub at the chemical hose system guide, and the acid and alkali selection guide (planned URLs – publish before linking).<\/p>\n\n\n\n

Next Steps for Camlock Fittings Specification and Sourcing<\/h2>\n\n\n\n

Reduce the decision to five moves, and the specification writes itself. Fix the bore. Fix the media and the temperature. Choose the body material. Choose the gasket. Choose the two ends, one adapter and one coupler. Then hand the vendor a one-line description for the camlock fittings in the order, because a clear line prevents a wrong shipment.<\/p>\n\n\n\n

Keep the order simple by fixing the parts that rarely change. Bore, media, and temperature usually hold for a given line, so they set the frame. Body material and gasket follow the media. The two ends follow the equipment ports, and the safety pins and spare gaskets follow the maintenance plan. Write the frame once and reuse it across the site.<\/p>\n\n\n\n

Pricing for camlock bodies depends on the body material, the bore, the gasket choice, and the order quantity. A factory-direct quote typically improves with a steady yearly volume, so treat any early figure as a planning figure. Ask for a documented quote before you commit, and keep the gasket and material notes on the same sheet.<\/p>\n\n\n\n

Hold the same specification frame steady across a site. A repeating set of bores, gaskets, and end styles keeps spares simple and cuts the chance of a wrong part at the pump. Write the choices into a short internal standard, and every new line follows the same path.<\/p>\n\n\n\n

Get a quote and free samples<\/a><\/p>\n\n\n\n

Camlock Fittings for Chemical Hose FAQs<\/h2>\n\n\n\n

What is a camlock fitting used for?<\/h3>\n\n\n\n

A camlock fitting joins a hose to a pipe, pump, tank, or another hose and locks with two cam levers instead of threads. Operators use it where connections change often, such as drum changes, tanker hookups, and wash-down lines. The lever closes by hand and opens by hand, so no wrench is needed. On a chemical line, the coupling carries the same media as the hose, so the body material and gasket must suit that media.<\/p>\n\n\n\n

How does the cam lever seal the joint?<\/h3>\n\n\n\n

The coupler holds a gasket, and the adapter carries an external groove. When you fold the lever down, its internal cam rides into that groove and pulls the adapter forward. The forward pull presses the adapter face against the gasket and closes the gap. The gasket does the sealing and the cam does the clamping, so a tired gasket leaks even when the levers feel tight.<\/p>\n\n\n\n

How many camlock coupling types are there?<\/h3>\n\n\n\n

The basic family has six working types, labeled A through F, plus two closures. Types A, B, C, D, E, and F each pair a camlock half with a hose tail, a male thread, or a female thread. Type DC is a dust cap and type DP is a dust plug, and both close an open end while a line is disconnected. Most jobs need only a few of these bodies.<\/p>\n\n\n\n

Which camlock type fits a hose tail?<\/h3>\n\n\n\n

Two basic types carry a hose tail or shank. Type C is a female coupler with a hose tail, and Type E is a male adapter with a hose tail. A hose that ends in a tail takes one of these bodies, because the barb clamps inside the hose bore. Match the tail to the hose bore exactly, and use the right clamp so the joint holds under pressure.<\/p>\n\n\n\n

What is the difference between a dust cap and a dust plug?<\/h3>\n\n\n\n

A dust cap, type DC, covers a male adapter. A dust plug, type DP, plugs a female coupler. Both keep dust, grit, and rain out of an open end while the line is disconnected. Use them whenever a line sits open, because grit left in a groove will stop a lever from closing. Keep the dust cap and dust plug on the same line, so the pair is never split across shelves.<\/p>\n\n\n\n

Which gasket suits a chemical hose camlock?<\/h3>\n\n\n\n

Choose by media first. A PTFE envelope gasket suits broad chemical service and aggressive media. An EPDM gasket suits water, dilute acids, and some alkalis. An FKM gasket suits oils, fuels, and many solvents. Temperature comes second, because a gasket that is chemically right can still be too soft or too stiff for the service. Keep spares labeled by material.<\/p>\n\n\n\n

How do I assemble a camlock connection safely?<\/h3>\n\n\n\n

Clean the adapter groove and the coupler seat, then check that the gasket sits flat. Push the adapter fully into the coupler. Fold both levers down until they lie flat against the body. Insert the safety pin through the lever. If a lever binds, stop and open the joint, because grit, a seal that has gone hard, or a body from another maker keeps it from closing. Test the joint at low pressure before a full transfer.<\/p>\n\n\n\n

How tight should the cam levers be?<\/h3>\n\n\n\n

Seat the levers with hand pressure only. A joint is tight when both levers lie flat on the body and the pin drops in without a fight. A lever that has to be forced is obstructed rather than tight. A loose lever is a fault to trace: check the groove, the gasket, and the body match before the next transfer.<\/p>\n\n\n\n

Which way should the cam levers point?<\/h3>\n\n\n\n

Each lever folds down and outward toward the coupler body, and it should lie flat when the joint is closed. Point the finished levers away from the flow path and away from nearby hardware. A lever that sticks out can catch on a rail or a fitting and lift. If a lever will not lie flat, open the joint and start again.<\/p>\n\n\n\n

What pressure and temperature can a camlock coupling handle?<\/h3>\n\n\n\n

EN 14420-7 sets a working range of -0.8 bar to 16 bar and -20 \u00b0C to +65 \u00b0C for cam locking couplings. The real limit for a given job is lower, because pressure capability typically decreases with bore size and drops with a plastic body. Always confirm the body and gasket against the media and the supplier data before a bulk order.<\/p>\n\n\n\n

About HENGHUA<\/h2>\n\n\n\n

Written by Ivan Chen, Technical Sales Lead, HENGHUA Hose.<\/p>\n\n\n\n

HENGHUA is a professional hose and coupling manufacturer serving distributors, retailers, and OEM brands worldwide. The chemical hose line includes UHMWPE (UPE), XLPE, and PTFE liners as well as rubber constructions in EPDM and oil-resistant synthetic rubber, with high-strength textile reinforcement and an optional steel helix for suction duty. On the fitting side, HENGHUA supplies camlock, flange, threaded, and clamp end terminations, and can build factory-crimped assemblies with custom lengths, layline printing, and private label or OEM\/ODM programs. Commercial terms include factory-direct pricing, short bulk lead times, and warranty.<\/p>","protected":false},"excerpt":{"rendered":"

A pair of camlock fittings joins two ends by seating a grooved adapter inside a grooved coupler, then folding two cam levers down to lock the joint. Chemical transfer crews reach for camlock fittings when a hose must connect and disconnect quickly without tools. These couplings, also known as cam and groove couplings, cover the 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