Pressurized lines employing quick-disconnect couplers should be considered potentially hazardous and must be used with safety in mind. Proper selection and use of appropriate couplers will help you maintain a safe working environment for personnel, equipment, and products.
ZSi-Foster quick-disconnect couplers are precision devices -- do not modify, strike, or otherwise abuse the coupling halves. Never exceed the pressure or temperature limits and always protect the hose and coupler assembly from moving equipment.
Be cautious when moving pressurized hoses as some types of quick-disconnect couplers may unintentionally disconnect if the coupler encounters an obstacle as the hose is dragged. The pressurized media subsequently escaping from the freed line can force the hose assembly to violently whip about, possibly causing personal injury, equipment/product damage, and economic loss. ZSi-Foster Safety Vent couplers and plugs, designed to minimize hose whip hazards, should be used wherever the risk is present. Personnel must be instructed to maintain a firm grip on both coupler halves when connecting or disconnecting pressurized lines.
Above all, always wear appropriate personal protection equipment and safety glasses when working with, or near, pressurized lines utilizing quick-disconnect couplers.
Safety Vent Couplers
ZSi-Foster Safety Vent couplers are designed to minimize the possibility of inadvertent disconnection and potentially hazardous hose whip. ZSi-Foster SV and SVPC Series Safety Vent couplers are "zero pressure" connect/disconnect type couplers designed to safely vent downstream pressure prior to disengaging the plug.
ZSi-Foster SVPC and SV Series Safety Vent Couplers
Safety Vent couplers are nearly effortless to connect and great for hose use. They are also especially useful for single-hand operation when they are mounted to hard lines such as an overhead air drop. Once inserted into the SV socket, the plug is lightly gripped and will stay in place allowing the operator to use the same hand to slide the sleeve straight forward to the "on" position. As the sleeve is being moved to the "on" position, the SV socket will securely lock the plug in place and then turn the flow "on".
SV Series sockets can also be used as a 3-way valve to turn off the flow of air and exhaust the downstream pressure without disengaging the plug. By turning and sliding the sleeve to the "exhaust" position, downstream air pressure is relieved but the plug remains locked in place. Turning and sliding the sleeve in the opposite direction allows air to flow again.
ZSi-Foster SV Series couplers are the ultimate solution to accidental disconnect hose whip dangers.
ZSi-Foster SVPC Series Safety Vent Couplers
The SVPC Series Safety Vent couplers provide the same safety vent features as the SV Series, and are plastic encapsulated to prevent scratching or marring of finished or fragile surfaces. The SVPC Series sockets will prevent plug release until the downstream line pressure is vented to atmosphere and the plug can be safely removed.
"Ball-Lock" (BL) option employs a ball or pin to restrict sleeve retraction and is available on ZSi-Foster D Series and DM Series sockets. Couplers with the BL designation are constructed with sleeves having a slot that must be aligned with a ball or pin before the sleeve is allowed to retract. Rotating the sleeve 180 degrees so the slot is not aligned with the ball or pin will minimize the chance of accidental sleeve retraction.
Ball Check Plugs
Ball check plugs are offered in several sizes of Industrial Interchange plugs. Ball check plugs have a free-floating internal ball that acts as a check valve when the plug is disconnected from the coupler. The check valve action minimizes hose whip by causing the pressurized gas to escape slowly from the disconnected hose.
ZSi-Foster Blow Gun products are designed for cleaning, blow-off, inflation, and other operations. The blowguns are available with zinc or nylon bodies with a variety of optional nozzles for nearly any use. ZSi-Foster Blow Gun tips are available in OSHA compliant and (*) non-compliant models to suit your particular needs.
Blow Guns and nozzles that comply with OSHA regulations will limit the pressure of air exiting the nozzle to less than 30 PSIG when the nozzle is dead-headed.
(*) Note: If a non-OSHA compliant blow gun nozzle (BGN6, or BGN7) is used, air pressure to the gun's inlet must be regulated to less than 30 PSIG to meet OSHA regulations.
We strongly recommend that the end user obtain proper training before using quick-disconnect couplers, air blowguns, and other ZSi-Foster products. Thoughtful analysis of the user's needs and application must be given before selecting a product.
Our dedicated employees and distributors are eager to explain the features, benefits, and proper selection of ZSi-Foster products, and answer your questions regarding their correct application and safe use.