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/

Importance of Cryogenic Valves and Regulators

What is a Regulator?

Regulators are valves. They are responsible for controlling the flow of liquids or gases that are contained within the cylinders and shutting off when the pre-determined pressure is reached. 

Why do I need a Regulator?

Regulators are very useful, if not necessary, in applications that demand controlled pressures. They reduce the chances of hazardous accidents. Gas regulators are a common and essential component of all industrial cylinders. The pressure range for Gas-Cryo regulators is in the range of 100 PSI to 6000 PSI. 

Evergreen Midwest is your one-stop-shop for Regulators. We carry a variety of regulators, including:

• Automatic Changeover Regulators.
• Cryogenic Gas Regulators.
• Inertrol Regulators.
• Liquid Cylinder Regulators.
• Low-Pressure Regulators.
• Oxygen Regulators.
• TapRite Beverage and Beer Tap Regulators.
• And Many More…

We ensure that all our valves and regulators comply with the international standards of valve performance, that all function properly and efficiently when in use.

For more information, please visit: https://www.evergreenmidwest.com/cryogenic-regulators.html, or contact our sales team by email: sales@evergreenmidwest.com, or by phone (800-659-3358).

Source - https://www.evergreenmidwest.com/blog/2018/01/28/importance-of-cryogenic-valves-and-regulators/

Sherwood Valve - Things You Must Know About Sherwood Valves

Sherwood Valve has been serving the compressed gas industry for over 90 years. Founded in 1923, Sherwood has earned a reputation for high quality products that not only keep pace with customer requirements, but also anticipate the changing needs of various industries served. All Sherwood products are designed to meet the highest standards and only quality materials are used.

As an authorized distributor, Evergreen Midwest carries Sherwood's diverse lines of specialty gas, compressed gas, refrigeration products, propane and life support equipment.

GRPV Residual Pressure Valves:

• Prevents backflow of impurities and foreign substances

• Retains approximately 30-50 PSI pressure

• Protects and extends the life of cylinders by preventing ingress of moisture.

GV Global Industrial Gas Valves:

• Use in cylinders containing oxygen, argon, carbon dioxide, nitrogen, helium and hydrogen, as well as welding gas mixtures.

• Pressure Relief Device (PRD) is a unitized plug design that provides excellent flow characteristics, ensures proper assembly and tamper resistance

• Metal-to-metal seal below bonnet threads prevents pressure in the threads at top of valve body

KVA Series - Post-Type Medical Valves:

• Inert PTFE packing provides leak-free stem seal, long cycle life and resistance to corrosion

• Secondary O-ring helps to provide a secure seal under vacuum purging and low-pressure operation

• Chamber design protects threads and stem from damage

Compressed Natural Gas Valves:

NGV, NGVHM & NGRPV Series

• For hydrocarbon-based flammable gases, such as methane and ethane.

• Unique valve core design and lesser internal stress zones

• PTFE backup O-ring and durable Buna-N O-ring that are compatible with flammable gases

• Tapped for dip tube as needed

Chlorine Valves:

• Easy to install due to the large wrench flats on the valve body

• Positive shut-off and exceptional durability in chlorine and other corrosive gas service because of the one-piece Monel® stem

• Valve body made from Aluminum Silicone Bronze that offers corrosion resistance

OxyGen I Series:

Oxygen Valves w/Integrated Regulators

• Compact, Easy-to-Use Design, Reliable, Quality Product

• Designed for ambulatory service applications, combine on/off with reduced pressure for direct patient care

• Ergonomically designed shroud with carrying handles improves mobility and reduces user fatigue

• Pressure gauge located at the top of the unit is clearly visible and protected by the shroud handle

Master Shut-Off Valves:

430 Series

• Safer - There is less chance of ignition from oxygen compression

• Controlled flow and Full flow is achieved when handle is turned two full turns

• PCTFE seat insert and PTFE packing has been used successfully for over 30 years in master shut-off valve applications

Source - https://www.evergreenmidwest.com/blog/2018/03/19/sherwood-valves-introduction/

Sherwood Chlorine Valves - Types of Chlorine Valves & Chlorine Gas Accessories

Sherwood Valve manufactures different types of Chlorine Valves and Chlorine Gas Accessories to better serve the ever-changing various industries.

1. Basic Valve
Manufactured in conformance to Chlorine Institute Pamphlet 17

• One-piece Monel stem offers exceptional durability and positive shut-off on chlorine and other corrosive gas service
• Choice of PTFE or Garlock 6130 Packing for easy operation and durable leak-resistant stem seal
• Large wrench flats on valve body for easy installation
• Robust aluminum silicon bronze valve body offer corrosion resistance

2. Robust Valve

• Featuring a heavy-duty body and packing nut for increased load carrying capacity and resistance against stress, corrosion and cracking
• Approved per the Chlorine Institute Pamphlet 17 Alternate Design Criteria
• Design retains same outlets, inlets, pressure relief device, packing ring, packings, follower, outlet cap, wrenches, yoke and materials (and key features) as the basic valve

3. Basic Chlorine Ton Container Valve

• Conforms to the Chlorine Institute Pamphlet 17
• Durable, leak-resistant stem seal
• Pressure relief device, follower, packing rings, packings, yoke, wrenches, outlet and inlets – all retain the same design as the basic chlorine valve

4. Robust Chlorine Ton Container Valve

• Manufactured in conformance to the Chlorine Institute Pamphlet 17 Alternate Design Criteria
• Large wrench flats facilitate easy installation
• Retaining the same design as the basic chlorine valve with pressure relief device, follower, packing rings, packings, yoke, wrenches, outlet and inlets

5. Chlorine Gas Accessories

• Fusible Plugs
• Yoke
• Flex Connectors
• High Flow Yoke Adapters
• 5928 Charging Valve
• Wrenches (Straight and Twisted)

For more information regarding Sherwood Chlorine Valves, visit www.evergreenmidwest.com or call us toll-free at 800-659-3358.
Source - https://www.evergreenmidwest.com/blog/2018/04/02/sherwood-chlorine-valves-types-of-chlorine-valves-chlorine-gas-accessories/