backflow

Can be used after inflating, easy to carry. Inflated and deflated when the valve just pinch flat, a dedicated anti-backflow device gas.

The fuel tank can be used for storing fuel and can supply the fuel to an engine and collect the fuel backflow through a fuel pipeline.

Field test shows that this technique has obviously improved fracturing fluid backflow and management efficiency.

A tanks-in-series model with backflow was used for mathematical modeling of the activated sludge wastewater treatment process.

The hose connection backflow preventer shall consist of two independently operating check valves with an intermediate atmospheric vent.

Backflow prevention should be present, along with a constant inert flow through the system.

Caution: Do not install a strainer ahead of the backflow preventer on seldom-used, emergency water lines (i. e. fire sprinkler lines).

a visual check of air gaps is sufficient , but mechanical backflow preventers have to be tested with properly calibrated gauge equipment.

Designed to retrofit backflow protection onto fire hydrants used for temporary water service.

At this point reverse flow may allow process products to backflow into the cylinder.

Disc : is designed to close on its own weight to stop backflow from gaining sufficient velocity to create damaging shock .

ASSEMBLY: If the backflow preventer is disassembled during installation, it MUST be reassembled in its proper order .

Can be temporarily removed for replacement of the backflow preventer without the need for replacement of freeze protection services .

The shutoff valve with the test cock is to be mounted on the inlet side of the backflow preventer.

there was backflow in some region close to the wall of the reactor.

The influence of secondary electron emission on efficiency and backflow can be improved through an elaborate electron optics design.

First: to act as an automatic non-return valve by preventing a backflow of steam from the main steam header to the boiler.

Allows for the installation of the backflow preventer "at the service connection" in accordance with AWWA Standards.

Results: The results show that 75% ethanol was the optimal solvent and backflow extraction with ethanol was the preferably method.

A strainer should be installed ahead of the backflow preventer to protect all internal components from unnecessary fouling.

If debris in the water system continues to cause fouling, a strainer can be installed upstream of the backflow assembly.

Strategically placed doors provide access to the backflow prevention assembly for testing and repair without removal of the entire unit .

in the chest caused by acidic backflow from the stomach irritating the esophagus; symptomatic of an ulcer or other disorder.

NOTE: DO NOT USE A PIPE WRENCH TO REMOVE THE RELIEF VALVE ASSEMBLY FROM THE BACKFLOW PREVENTER.

Fracture reconstruction faced problems, including difficult demulsification of fracturing fluid, low backflow rate and poor effect.

A combination fill valve and backflow preventer shall be installed on the boiler feed line to provide make-up water to the boiler.

Watts Regulator offers a wide variety of backflow testing equipment, outlined in the following pages of this guide.

To protect the potable water supply from backflow from a non-potable source due to a drop in supply.

The ideal solution for residential containment applications that require in-line testable and serviceable dual check backflow preventers.

To avoid this discharge, install a spring- loaded check valve ahead of the backflow assembly to "lock-in" the downstream pressure.

Mechanical backflow preventers have internal seals, springs , and moving parts that are subject to fouling, wear, or fatigue.

The 957 and 957RPDA backflow preventer should be tested by a certified tester at the time of installation.

The analytic calculation approach for minimum backflow ratio of binary ideal solution multi lateral lines distillation tower is introduced.

In-line flow restrictor protects the meter measuring element and the backflow preventer components from damage due to excessive flow.

It eliminates the necessity of closing the inlet ball valve which could release pipe scale and foreign matter into the backflow preventer.

The utility model relates to a backflow prevention type esophagus supporting tube for medical use.

Its own rules include the rules of keeping up with times, interacting between host and guest and two--way backflow.

DUAL CHECK VALVE BACKFLOW PREVENTER For low hazard cross- connections . Continuous pressure applications .

These spring-operated poppet valves, with optional relief settings, allow free flow in only one direction and prevent backflow.

The relief valve may be serviced while on or off the backflow preventer valve.

REDUCED PRESSURE ZONE BACKFLOW PREVENTER For High Hazard Cross-connections and continuous pressure application.

The user installs a dual check backflow preventer at the water meter as prescribed by the supplier of safe drinking water .

A check valve may be required ahead of the backflow preventer . *Please see "Troubleshooting" , Page 7, prior to installation.

Closing of the valve during ventricular contraction prevents the backflow of blood into the atrium.

The hose connection backflow preventer shall be in line field testable without the use of special test gauges or instruments.

Some even with spray nozzle to the impact of backflow mixing effect, water medicine without sufficient agitate immediately spray.

To avoid this discharge, install a spring-loaded, rubber seated check valve ahead of the backflow assembly.

Note: Local codes typically require the use of a backflow preventer in the system (Watts Model 9D) .

The gate valve with the test cock is to mounted on the inlet side of the backflow preventer .

A strainer should be installed as shown, ahead of the backflow preventer to prevent discs from unnecessary fouling.

LOWER ENERGY CONSUMPTION Three lobes'design control backflow pressure to rotor so reduce energy consumption.

To prevent this from happening, the house's external tap should be fitted with a backflow prevention device.

Furthermore, the influence of central bluff body and velocity of swirling secondary air on backflow field are analyzed.

The TK-DL can test pressure vacuum breakers, reduced pressure backflow preventers or double check valve assemblies.

For use with backflow preventers, isolation valve for gauges , isolation valves for small equipment lines.

Installing a backflow preventer in a pit or vault is not recommended.

The system should be flushed before the backflow valve is installed.

and the bottle neck and the anti-backflow bottle mouth are also provided with corresponding positioning structures.

Model 994BLT Portable Hydrant Backflow Preventer is designed and manufactured to provide long-term service with minimal maintenance.

Protection against pollution of potable water in water installations and general requirements of devices to prevent pollution by backflow.

Backflow preventers should never be placed in pits unless absolutely necessary and then only when approved by local codes.

When cleaning, the valve of the pipeline controls the backflow of the liquid with convenience.

Finally the proposed blowout technology is conducive to guide the operation and improve the backflow effect.

The water utility supply meter may contain a check valve, backflow preventer , or water pressure reducing valve.

Another problem can occur rarely if backflow of process gas is permitted into the secondary air feed line.

After removing the first check from the backflow valve body, place on a flat surface with the coil spring facing up.

Contact the factory for specific approvals on the reduced pressure backflow preventer .

Air Gap installs easily to the bottom of the 009, 909 and 909RPDA backflow assembly relief valve.

A strainer should be installed as shown, ahead of backflow preventers to prevent discs from unnecessary fouling.

a strainer should be installed as shown , ahead of backflow preventer to prevent disc from unnecessary fouling.

During this time molten metal may backflow from the molten risers to feed the part and maintain the same shape.

A check valve may be required ahead of the backflow preventer.

Backflow preventer manufactured from 300 Series stainless steel for corrosion resistance.

reducing backflow of the intestinal contents into bile duct.

With the quickening of RMB reforms, Shanghai is also scrambling to devise new RMB backflow methods.

Double Exhaust System helps to prevent backflow of unwanted contaminates into the helmet.

The second check is fouled during emergency backflow or resulting from a water hammer condition.

Therefore, how to solve the negative effects of backflow of labor is our problem to be solved.

Backflow preventers should never be placed in pits unless absolutely necessary and then only when and as approved by local codes.

Slowly open upstream shutoff and allow the backflow preventer to fill slowly.

Since then we installed a backflow valve so it was less this time.

The deterioration process of inlet low pressure area caused by backflow on cavitations characteristics of inducer was analyzed.

Dusts backflow continues to contaminate Beijing's air, according to an environmental expert.

The happy blood is unable the backflow centripetal dirty.

For promotion of sludge or slag backflow qualitative wastewater, can play the role that less reliable.

The valve shall contain a Watts Regulator Model 9D backflow preventer and Model 1156 feed water pressure regulator.

The details of the flow fields such as the backflow, vortex and secondary flow were revealed.

The dual check backflow preventer shall be designed under the ASSE Standard 1024.

The previous inventory modules basically take no consideration of factors such as goods rejection and products backflow.

When installing a drain line, use Series 909 air gaps on Model 909 backflow preventers.

Who could go back in time, even if backflow, and we can hold for what?

The utility model can avoid the secondary pollution which is caused because of backflow of water.

Such as pumping up you must turn off valve to prevent backflow of concrete, then removed the feed tube.

Performance Requirements for Double Check Backflow Prevention Assemblies and Double Check Fire Protection Backflow Prevention Assemblies

Comparison of Methods to Determine COD in Water, Micro Backflow Colorimetric Detector and Titration

Performance Requirements for Backflow Preventer with Intermediate Atmospheric Vent

Discharging by gravity, the elevator features low linear velocity of the belt, no material backflow and little breakage;

Condensate Gas Reservoir Fracturing Backflow Parameter Optimization

Preliminary research of the influence of distorted model scale on backflow similarity of reentrant harbor basin

Strength verification and safety analysis of the shell of the top backflow gas heat exchanger

The experimental research of the flow field and turbulence characteristics in the scour and backflow region around a groin;

Performance Requirements for Backflow Preventers on Carbonated Beverage Machines

Reduced Pressure Principle Backpressure Backflow Preventer

Performance requirements for backflow protection devices and systems in plumping fixture fittings

Performance requirements for backflow protection devices and systems in plumbing fixture fittings

To protect the potable water supply against backflow from a non-potable source due to negative supply pressure

There should be redundant backflow check valves present to prevent contamination of the purge gas cylinder with process gas;

Study of the backflow regions in a gas burner

Numerical Simulation on the Dimension of the Backflow Region in a Gas Burner

Performance Requirements for Backflow Devices and Systems in Plumbing Fixture Fittings

Experimental study on stepwise sludge backflow in multistage aerobic technology

Creating Talent Aggregating Mechanism and Promoting Talent Backflow

Design of the Backflow Control Cabinet for the Power Supply of the Underground

reduced pressure detector assembly backflow preventer

Backflow in an Inverse Twisted Nematic Liquid Crystal Cell

Structural Feature of the Backflow Precipitation over North China

Pressure outlet to prevent backflow of carbon dioxide gas and carbonated water into the water supply system to beverage machines

Analysis of Multiplier Effect on Public Investment and Backflow Rural Laborers'Enterprises

Research on backflow method and backflow device of fan used in subway

Problems in engineering application of backflow prevention unit

Survey and Analysis of Consolidated Sand in Varying Backflow Zone of Hanjiang Reservoir

Effect of Feeding During Settlement in Non-Backflow Intermittent Aeration System

Strength of body and hydraulic pressure loss testing of backflow special check valves

Calculation of Wet Air Backflow Disturbance in Arranging Cooling Towers

Ultrasonic and backflow technologies to extract ursolic acid from Eriobotrya japonica leaves

Installation Instructions Watts No. SD-3 Backflow Preventer for Carbonated Beverage Machines

Analysis of Multiplier Effect on Backflow Rural Laborers'Enterprises

The Regulating Backflow Valve of Reciprocal Compressor

Development and application of anti-plugging and backflow-proof casing jet pump

Principle and Application of Anti-Backflow Apparatus

First, we analysis the model contain backflow items and the demand is smooth, give a numerical example;

Type DLG Centrifugal Blower with Multi Backflow Passages

Backflow Control in Bin and Feeder Ball Mill Coal Pulverizing Systems

Reinforcement of Water Gate by Underwater Joint Backflow Grouting

Air braking systems; shuttle valve with backflow

Numerical Analysis of Backflow Distance of Smoke in Mine Fire

Four Basic Types of Backflow Preventers

Dual Check Valve Type Backflow Preventers

Theoretical study on the backflow distance of smoke and hot gasesin a roadway fire

Presenting Series 7 Dual Check Backflow Preventers from Watts

Eight zones lead-free backflow welder;

An Improvement on Structure of Backflow Type Downhole Gas Separator

Renal backflow of contrast agent

single well backflow tracer test

Thanksgiving is the backflow of love and it transfers endlessly because of love