Understanding Irrigation Master Valves and Their Wirings

Master valves are essential equipment when considering the installation of an irrigation system. It is an electric valve that completely controls the water flow from the supply point. The valve helps reduce water leakage from a leaky station valve as it supplies pressure to it. As the name suggests, it masters the water supply in case your irrigation main line damages. 

A master electric valve is similar to your station valves, but instead of being installed in the downstream from the main line, it is installed at the front of the line in the upstream and is connected to the master pump in the controller.

Let us now understand the master/pump valves wiring:

Usually the timers in the sprinkler systems supply power to a relay so that it could send power to the sprinkler pump. The sprinkler systems use secondary water and are supplied water at very low temperatures.

Master valves are essential equipment when considering the installation of an irrigation system. It is an electric valve that completely controls the water flow from the supply point. The valve helps reduce water leakage from a leaky station valve as it supplies pressure to it. As the name suggests, it masters the water supply in case your irrigation main line damages. A master electric valve is similar to your station valves, but instead of being installed in the downstream from the main line, it is installed at the front of the line in the upstream and is connected to the master pump in the controller.

Let us now understand the master/pump valves wiring:

Usually the timers in the sprinkler systems supply power to a relay so that it could send power to the sprinkler pump. The sprinkler systems use secondary water and are supplied water at very low temperatures.

• The circuit is connected with the wires from the relay – one wire to the common terminal and one to the valve terminal. The relay gets power when the timer activates it.
• On receiving power, the relay closes contacts and power goes to the pump to activate it. The selector on the pump allows using 110 volts, otherwise it is pre-wired for 230 volts.
• At the same time when the controller/timer sends power to the sprinkler pump, it also sends power to the sprinkler master valve and opens it. So, when the pump creates pressure in the system, this opens the sprinkler zone and waits for water.

This is the complete cycle. On completion of this cycle, power to the sprinkler valves is shut off by the timer/controller. At the same time, it shuts off the power that is supplied to the relay and the pump. Although it varies from timer to timer, most of the pump valve circuits are by default on the sprinkler controller/ timer.

Its configuration is technically simple. However, users no longer have to select the zone to which the valve is connected to, as now the option will completely depend on the controller selected when you set up the controller for the first time. Evergreen Midwest is an online store that stocks all types of industrial valves and regulators and has been serving the industry since 1973. To place an order for master valves, please call us at 1800.659.3358 or visit our website at https://www.evergreenmidwest.com/master-valves.html

Source - https://www.evergreenmidwest.com/blog/2017/07/18/understanding-irrigation-master-valves-and-their-wirings/

Check Valves - Things All You Should Know

Check valves are a kind of valves that serve multiple purposes and are an essential valve required in almost all the industries. Practically, there is no industry where these are not installed on the operating systems. Valves in general are a critical component of any machinery and therefore must be selected after proper research for quality, durability, and sustainability. Your decision will greatly impact the functioning of machineries and the ultimate outcome of the project the valves are used for.

Construction of a Check Valve

The basic construction consists of a bonnet, valve body, and a disk that is attached to a hinge and moves away from the valve seat to allow the fluid to flow forward and returns when the upstream flow is stopped and thereby preventing reverse flow. The folding disc valves have a disk that consists of two halves that are attached in the middle and fold backwards once the upstream flow is initiated. When the upstream flow stops, these two halves spontaneously close the flow path. In lift-check valves, the disk comes in the form of a piston which is moved out of the path during upstream flow and returns by gravity to stop the flow. In case of ball valves, the disc is in the form of a ball.

Applications of Check Valves/ One-Directional Valves

These valves are generally installed in operations in which there are chances of total or partial shut-down of a compressor or pumps due to backflow of gases or liquids. So, these types of valves are most commonly found in gas systems and certain other applications where liquid flow has to be controlled.

This list is a necessary go-through before placing an order as it gives a complete insight of the utilities these valves can be put to:

• Be careful while selecting the size as properly sized valves contributes to longer life of the valves, pumps, as well as other related components.

• While an oversized valve could cause an early wear or failure of certain essential components, an undersized valve results in high loss in pressure, excessive noise, and even vibration.

• They are essential for smooth operation of fluid pumping systems.

• They can efficiently reduce Water Hammer condition that can badly damage pipes, Water hammer is caused due to pressure surge because of liquid forcing to stop suddenly while in motion.

• A properly sized check valve guarantees to provide the prescribed flow while consuming minimal amount of energy which makes it truly cost and energy-efficient.

• It is utmost important to keep a check on the valves for their size before being used for low flow applications. This will ensure that the valves are completely open on maximum fluid flow.

• There are soft seats that offer bubble tight leakage control and the metal sealing surfaces permit some amount of leakage to seep through.

At Evergreen Midwest, you will find a wide range of check valves. Please visit https://www.evergreenmidwest.com/check-valves.html to select a specific type that suits your requirements.

Source - https://www.evergreenmidwest.com/blog/2017/08/28/all-you-should-know-about-check-valves/

Latex and Mylar Balloon Fillers

Evergreen Midwest Co. carries a wide variety of Balloon Fillers, including Latex and Mylar Fillers!

Our balloon fillers are the ultimate product, they ease the job while filling a large quantity of balloons within a few minutes. These balloon fillers are designed to fill balloons to uniform size to prevent the worry of overfilling, causing loss of materials and financial loss too.  Our balloon fillers feature a single unit to fill both Latex Balloons and Mylar Balloons!

We have large variety of Balloon Fillers, including inflators with or without hand-tight connections. We also carry content gauges, so you never have to fear running out of helium unexpectedly again!

Easing efforts of people involved, saving time for other important applications!

Reliable and durable solutions for small-scale and large-scale applications alike!

For more information regarding our Balloon Fillers, please visit https://www.evergreenmidwest.com/balloon-fillers.html, or call us: 800-659-3358.

Source - https://www.evergreenmidwest.com/blog/2018/01/25/evergreen-midwest-co-latex-and-mylar-balloon-fillers/

CO2 Cylinders - Storing of CO2 Cylinders

Anyone storing CO2 cylinders should be aware of the hazards associated with CO2 and should be trained in safe practices of storing CO2 cylinders. Below is a list of suggested safe storage practices of CO2 cylinders.

1. CO2 cylinders should always be stored in a specified area. The storage area should:
a. Be well ventilated. Small concentrations of CO2, as little as 15%, can cause loss of consciousness in less than one minute.

b. Be away from the edge of any elevated area. Falling CO2 cylinders from elevated areas can cause damage to the cylinder, valve, property and personnel.

c. Be away, or protected, from areas with high traffic. Areas of high traffic only increase the chance of an accident occurring.

d. Be dry and free of a corrosive atmosphere

e. Have adequate means to secure all cylinders stored in the area. The means of securing should be sufficient enough to hold the cylinders in place, while not causing damage to the cylinders.

f. Be a continuously cool place. Do not store cylinders adjacent to any source of heat, continuous or intermittent. *For more information regarding the dangers of overheating CO2 cylinders, please visit our blog next week*.

2. Never store a charged CO2 cylinder in a passenger vehicle or in the cab portion of any vehicle.
Empty Co2 cylinders should be stored with the valve tightly closed.

3. Cylinders can be stored standing upright on their base or lying on their side, although it is highly recommended that all

4. CO2 cylinders should be stored as designed, standing upright on their flat base.

5. Cylinders should never be stored where they might become part of an electrical circuit.

6. Cylinders, which have been manufactured to accommodate a valve protective carry handle or a protective cap, should be stored with these accessories installed and in place.

Including all the above in practices of storing CO2 cylinders safely should enhance the safety of all personnel, equipment, and property.

For more information regarding technical support documents on cylinders, please visit www.cganet.com.

Source - https://www.evergreenmidwest.com/blog/2018/02/26/storing-co2-cylinders/

CO2 Cylinders | 10 Great Tips for Safely Filling CO2 Cylinders

It is HIGHLY recommended that only trained personnel fill CO2 cylinders.

1. Perform an external inspection

2. Never fill a damaged cylinder, a cylinder with a damaged valve or a cylinder that has a valve with an altered safety relief device

3. Never fill, or “top off” a partially filled CO2 Cylinder

4. Empty all remaining contents of CO2 Cylinder

• Position it properly: rotate the cylinder so the valve port is facing away from all personnel and equipment.
• If not equipped with a dip-tube, cylinder should be inverted.

5. After moving or positioning the cylinder for emptying, allow a few minutes for any residual CO2 charge to settle before emptying.

• When ready, slowly open the valve, emptying any remaining charge and other contents (moisture, contamination, corrosion, etc.) from the valve.
• When empty, close the valve
• If any content other than CO2 charge is emptied from the cylinder, including any unusual odor, do NOT refill the cylinder. This cylinder should be subjected to further inspections.

6. Place cylinder on calibrated scale (should be able to measure weight with 3 significant digits – XX.X or X.XX, depending on size of cylinder)

7. Secure connection of filling hose to the cylinder

8. Record weight of connected empty cylinder to 3 significant digits. Add this weight to the CO2 charge marked on the crown of the cylinder.

• Connected Empty Cylinder weight (3 sig. digits) + CO2 charge marked on cylinder crown = Target fill weight

9. Open the valve slowly and fill cylinder. This should be done slow enough to accurately monitor the weight on the scale as to not exceed the target fill weight. Once the scale has reached the target fill rate, stop the fill by closing the valve

10. With hose still connected, verify the final weight is same as target fill weight. If the cylinder has been over-filled, discharge the overfill immediately - DO NOT WAIT.

Never over fill a CO2 Cylinder. Overfilling a CO2 Cylinder, even by a small amount, can cause the safety relief device on the valve to actuate and CO2 could be discharged unexpectantly. Unexpected discharge of CO2 gas through an actuated safety relief device has been known to cause accidents, sometimes leading to personnel injury or property damage.

For more information regarding technical support documents on cylinders, please visit www.cganet.com.

Source - https://www.evergreenmidwest.com/blog/2018/02/12/10-great-tips-for-safely-filling-co2-cylinders/