MECLINE
Frequently asked questions
Common questions about MECLINE from 3G Electric.
What are the maximum operating pressures for MECLINE unloader valves?
MECLINE unloader valves are available in two pressure ratings based on the model. The VR54-200 model has a maximum operating pressure of 2,900 psi, while the VRT100-330 model is rated for up to 4,800 psi. Both are constructed from brass with NPT bypass connections. These ratings apply to the valve body and internal components under standard operating conditions. Always verify that the system pressure does not exceed the valve's rated maximum to avoid failure.
What pipe sizes are available for MECLINE brass inline piston check valves?
MECLINE brass inline piston check valves are offered in three pipe sizes: 1/4 inch (SKU 20FV59, MPN CV3-31014), 3/8 inch (SKU 20FV60, MPN CV3-40038), and 1/2 inch (SKU 20FV61, MPN CV3-40012). All have FNPT x FNPT connections with NPT threads. The valve body is inline and made of brass, with a piston design for backflow prevention. These sizes cover common small-bore piping used in industrial fluid systems.
Are MECLINE check valves suitable for use with water or air systems?
Yes, MECLINE brass inline piston check valves are suitable for water, air, and light oil systems. The brass construction provides corrosion resistance in these media, and the piston design allows for reliable sealing under moderate flow conditions. However, they are not recommended for aggressive chemicals or high-temperature steam without verifying compatibility. The valves are rated for standard industrial pressures, but specific pressure ratings are not listed in the available specifications; consult the manufacturer for detailed pressure-temperature limits.
What is the difference between the MECLINE VR54-200 and VRT100-330 unloader valves?
The primary difference between the MECLINE VR54-200 and VRT100-330 unloader valves is the maximum operating pressure and bypass connection size. The VR54-200 has a 3/8 inch NPT bypass connection and a maximum pressure of 2,900 psi. The VRT100-330 has a 1/2 inch NPT bypass connection and a higher maximum pressure of 4,800 psi. Both are made of brass and use NPT threads. The choice depends on the system's pressure requirements and piping size.
Can MECLINE check valves be installed in any orientation?
MECLINE inline piston check valves are designed for installation in a horizontal or vertical orientation, but the manufacturer typically recommends mounting them with the flow arrow aligned to the direction of flow. For piston-type check valves, vertical installation with flow upward may improve sealing performance due to gravity assisting the piston closure. Always follow the manufacturer's installation guidelines to ensure proper operation and prevent damage from reverse flow.
Does 3G Electric supply MECLINE products?
Yes — 3G Electric (S) Pte. Ltd. supplies MECLINE products. We stock the MECLINE catalog and supply genuine factory-original products with full manufacturer warranty and technical support.
