The present invention provides a foam dispenser having a twice automatic cleaning function that automatically discharges a compressed air toward a mixing chamber, when releasing a pulled trigger lever, thereby improving convenience of work and providing economic advantages. The foam dispenser having a twice automatic cleaning function includes a main body 4 including a hose connection unit 34 and an air hose connector 42, a coupling end part formed at the other end thereof, a pair of fluid passageways 20, an air passageway 22, and a handle 3; a dispensing nozzle 6 connected to the coupling end part of the main body 4, has a mixing chamber 64; a separate-fluid supply unit 8 provided inside the main body 4 to open or close the fluid passageways 20; and an automatic cleaner 10 provided at a middle portion of the air passageway 22 to automatically open the air passageway 22.

The present invention provides a foam dispenser having a twice automatic cleaning function that automatically discharges a compressed air toward a mixing chamber, when releasing a pulled trigger lever, thereby improving convenience of work and providing economic advantages. The foam dispenser having a twice automatic cleaning function includes a main body 4 including a hose connection unit 34 and an air hose connector 42, a coupling end part formed at the other end thereof, a pair of fluid passageways 20, an air passageway 22, and a handle 3; a dispensing nozzle 6 connected to the coupling end part of the main body 4, has a mixing chamber 64; a separate-fluid supply unit 8 provided inside the main body 4 to open or close the fluid passageways 20; and an automatic cleaner 10 provided at a middle portion of the air passageway 22 to automatically open the air passageway 22.

Various examples are provided related to low pressure delivery, e.g., less than 250 psi at the point of application, of plural component system from unpressurized parts A and B material supplies. In one example, a system includes a polyurethane spray foam (SPF) raw material supply including parts A and B and a fluid handling system that can deliver the SPF raw material at low pressure to a metal spray gun in metered amounts through separate material fluid paths/conduits via a heated hose length and a whip hose. The fluid handling system can also deliver air at low pressure to the spray gun through separate air stream paths so that the air is communicated to the part A and B material conduits forward of the part A and B material input locations, where they are supplied separately to a mixing nozzle that is engaged at an end of the spray gun.

Various examples are provided related to low pressure delivery, e.g., less than 250 psi at the point of application, of plural component system from unpressurized parts A and B material supplies. In one example, a system includes a polyurethane spray foam (SPF) raw material supply including parts A and B and a fluid handling system that can deliver the SPF raw material at low pressure to a metal spray gun in metered amounts through separate material fluid paths/conduits via a heated hose length and a whip hose. The fluid handling system can also deliver air at low pressure to the spray gun through separate air stream paths so that the air is communicated to the part A and B material conduits forward of the part A and B material input locations, where they are supplied separately to a mixing nozzle that is engaged at an end of the spray gun.

A method minimizes emissions while spraying a mixture of a resin composition and a polyisocyanate onto a surface. The resin composition has a hydroxyl content of at least 400 mg KOH/g and includes a blowing agent that is a liquid under pressure, a first polyol, at least one additional polyol other than the first polyol, and optionally a catalyst, surfactant, and water. The mixture is sprayed onto the surface to form a polyurethane foam having a closed cell content of at least 90 percent. The mixture is also sprayed through a spray nozzle at a spray angle corresponding to a control spray angle of from 15 to 125 degrees measured at a pressure of from 10 to 40 psi using water as a standard. The step of spraying produces less than 50 parts of the polyisocyanate per one billion parts of air according to OSHA Method 47.

Exemplary embodiments of dispensers are disclosed herein. One exemplary dispenser is a soap or sanitizer dispenser. The dispenser includes a housing. A removable and replaceable concentrate container for holding concentrated soap or sanitizer is located within the housing. A concentrate pump is in fluid communication with the concentrate container. A diluent container for holding a liquid is also located within the housing and a diluent pump for pumping the diluent is also included. The dispenser includes a mixing chamber in fluid communication with the concentrate pump and the diluent pump. The dispenser includes an outlet. When concentrated soap or sanitizer is pumped from the concentrate container, it mixes with diluent pumped from the diluent container to form a diluted mixture. The diluted mixture is dispensed at the outlet of the dispenser.

A slurry arm is provided. The slurry arm includes: an arm body; a slurry line that extends through the arm body; an oxygen removal chamber provided in the arm body and configured to receive slurry from the slurry line; a purge gas supplier configured to supply a purge gas to the slurry in the oxygen removal chamber; and a main valve configured to selectively discharge gas from the oxygen removal chamber.

A dispenser used for discharging a mixture of gas and a paste material includes: a nozzle part provided in a tip end part of a body and having a tip end opening through which the mixture is discharged; a flow path extending from a mixture introduction part to the tip end opening through a hollow space of the nozzle part; a needle part movable in the flow path of the nozzle part to open and close the flow path; a driving part that drives the needle part; and a stopper part that limits an operation range of the needle part. The nozzle part has a tapered section in which an inside diameter of the flow path of the nozzle part decreases toward the tip end opening. Also provided is a stopper position adjusting part that adjusts a stop position defined by the stopper part.

A dispenser for discharging a mixture of gas and a paste material includes: a nozzle part (2) provided in a tip end part of a body (11) and having a tip end opening; a flow path (4) for the mixture extending from an introduction part (5) for the mixture to the tip end opening through a hollow space of the nozzle part; a needle part (3) movable in the flow path of the nozzle part to open and close the flow path 4; a driving part (7, 8, and 9) that drives the needle part; and a stopper part (10, 14, and 16) that limits an operation range of the needle part. The nozzle part as a tapered section in which an inside diameter of the flow path of the nozzle part relative to an operation range of a tip end of the needle part decreases toward the tip end opening.