MI Series

Behind every steady, comfortable room is a joint quietly doing its job — precisely, reliably, never complaining.

“Precision in Every Split. Performance in Every Space.”

Envision a VRF system operating at peak efficiency, with the refrigerant flowing like a well-coordinated choreographed dance, pressure losses eradicated, and joints sealed with unshakable integrity. That’s the world the 227 Enterprise MI Series was designed for. Every kit is a harmony of engineering precision, manufactured from BIS certified refrigeration grade copper with precision calibrated Y joints, matched reducers and factory applied insulation that perform in perfect harmony. The MI Series is available in quality XLPE and NBR insulation choices, which simplifies installation and eliminates condensation and heat loss. All components are 100% pressure tested and designed to fulfill the RoHS compliance and Australian Standard AS4041 setting the global standard for quality.

The MI Series has shown its value in 35+ countries, from OEMs optimizing manufacturing lines to contractors developing tomorrow’s climate-controlled environments, and is the go-to choice for customers who demand consistent reliability. Engineers picked it. It’s a professional tool. Systems are better with it. The 227 Enterprise MI Series is more than just plumbing. It is the silent force behind systems that work flawlessly for years, the embodiment of our absolute commitment to precision engineering, international manufacturing standards and products that never compromise on anything less than quality.

Product Features

Product Specification

Model Number	Pipe	Pipe A (ID)	Pipe B (ID)	Pipe C (ID)
Pi-FQZHN-01	Gas Side	19.05 (3/4) – 15.88 (5/8)	15.88 (5/8) – 12.70 (1/2)	15.88 (5/8) – 12.70 (1/2)
Pi-FQZHN-01	Liquid Side	9.52 (3/8)	9.52 (3/8) – 6.35 (1/4)	6.35 (1/4)
Pi-FQZHN-02	Gas Side	22.22 (7/8) – 25.4(1)	19.05 (3/4) – 15.88 (5/8) – 12.70 (1/2)	19.05 (3/4) – 15.88 (5/8)
Pi-FQZHN-02	Liquid Side	12.70 (1/2) – 9.52 (3/8)	9.52 (3/8) – 6.35 (1/4)	9.52 (3/8) – 6.35 (1/4)
Pi-FQZHN-03	Gas Side	28.58 (1-1/8)-31.75 (1-1/4)	22.22 (7/8) – 19.05 (3/4) – 15.88 (5/8)	22.22 (7/8) – 19.05 (3/4)
Pi-FQZHN-03	Liquid Side	15.88 (5/8) 19.05 (3/4)	12.70 (1/2) – 9.52 (3/8) – 6.35 (1/4)	12.70 (1/2)-9.52 (3/8)
Pi-FQZHN-04	Gas Side	34.93 (1-3/8) – 38.1 (1-1/2)	28.58 (1-1/8) – 22.22 (7/8) – 19.05 (3/4)	28.58 (1-1/8) – 22.22 (7/8)
Pi-FQZHN-04	Liquid Side	19.05 (3/4)-22.22 (7/8)	15.88 (5/8) – 12.70 (1/2) – 9.52 (3/8)	15.88 (5/8) 12.70 (1/2)
Pi-FQZHN-05	Gas Side	41.28 (1-5/8)-44.45 (1-3/4)	44.45 (1-3/4)-41.28 (1-5/8) – 34.93 (1-3/8)	41.28 (1-5/8)- 34.93 (1-3/8)
Pi-FQZHN-05	Liquid Side	22.22 (7/8)-25.4 (1)	19.05 (3/4) -15.88 (5/8) – 12.70 (1/2)	19.05 (3/4) – 15.88 (5/8)
Pi-FQZHN-06	Gas Side	63.5 (2-1/2)-54 (2)	54(2)-63.5 (2-1/2) – 41.28 (1-5/8)	41.28 (1-5/8) – 34.93 (1-3/8)
Pi-FQZHN-06	Liquid Side	25.4 (1) 22.22 (7/8)	22.22 (7/8) – 25.4 (1) – 19.05 (3/4)	19.05 (3/4) 15.88 (5/8)
Pi-FQZHN-07	Gas Side	63.5 (2-1/2)-54 (2)	54 (2)-63.5 (2-1/2) – 41.28 (1-5/8)	41.28 (1-5/8) – 34.93 (1-3/8)
Pi-FQZHN-07	Liquid Side	31.75 (1-1/4) – 28.58 (1-1/8)	28.58 (1-1/8) – 22.22 (7/8) – 19.05 (3/4)	22.22 (7/8) – 19.05 (3/4) – 15.88 (5/8)

Model Number	Pipe	Pipe A (ID)	Pipe B (ID)	Pipe C (ID)
Pi-FQZHN-01	Gas Side	19.05 (3/4) - 15.88 (5/8)	15.88 (5/8) - 12.70 (1/2)	15.88 (5/8) - 12.70 (1/2)
Pi-FQZHN-01	Liquid Side	9.52 (3/8)	9.52 (3/8) - 6.35 (1/4)	6.35 (1/4)
Pi-FQZHN-02	Gas Side	22.22 (7/8) - 25.4(1)	19.05 (3/4) - 15.88 (5/8) - 12.70 (1/2)	19.05 (3/4) - 15.88 (5/8)
Pi-FQZHN-02	Liquid Side	12.70 (1/2) - 9.52 (3/8)	9.52 (3/8) - 6.35 (1/4)	9.52 (3/8) - 6.35 (1/4)
Pi-FQZHN-03	Gas Side	28.58 (1-1/8)-31.75 (1-1/4)	22.22 (7/8) - 19.05 (3/4) - 15.88 (5/8)	22.22 (7/8) - 19.05 (3/4)
Pi-FQZHN-03	Liquid Side	15.88 (5/8) 19.05 (3/4)	12.70 (1/2) - 9.52 (3/8) - 6.35 (1/4)	12.70 (1/2)-9.52 (3/8)
Pi-FQZHN-04	Gas Side	34.93 (1-3/8) - 38.1 (1-1/2)	28.58 (1-1/8) - 22.22 (7/8) - 19.05 (3/4)	28.58 (1-1/8) - 22.22 (7/8)
Pi-FQZHN-04	Liquid Side	19.05 (3/4)-22.22 (7/8)	15.88 (5/8) - 12.70 (1/2) - 9.52 (3/8)	15.88 (5/8) 12.70 (1/2)
Pi-FQZHN-05	Gas Side	41.28 (1-5/8)-44.45 (1-3/4)	44.45 (1-3/4)-41.28 (1-5/8) - 34.93 (1-3/8)	41.28 (1-5/8)- 34.93 (1-3/8)
Pi-FQZHN-05	Liquid Side	22.22 (7/8)-25.4 (1)	19.05 (3/4) -15.88 (5/8) - 12.70 (1/2)	19.05 (3/4) - 15.88 (5/8)
Pi-FQZHN-06	Gas Side	63.5 (2-1/2)-54 (2)	54(2)-63.5 (2-1/2) - 41.28 (1-5/8)	41.28 (1-5/8) - 34.93 (1-3/8)
Pi-FQZHN-06	Liquid Side	25.4 (1) 22.22 (7/8)	22.22 (7/8) - 25.4 (1) - 19.05 (3/4)	19.05 (3/4) 15.88 (5/8)
Pi-FQZHN-07	Gas Side	63.5 (2-1/2)-54 (2)	54 (2)-63.5 (2-1/2) - 41.28 (1-5/8)	41.28 (1-5/8) - 34.93 (1-3/8)
Pi-FQZHN-07	Liquid Side	31.75 (1-1/4) - 28.58 (1-1/8)	28.58 (1-1/8) - 22.22 (7/8) - 19.05 (3/4)	22.22 (7/8) - 19.05 (3/4) - 15.88 (5/8)

Why 227 Enterprise

In the high-stakes world of enterprise VRF systems, there’s no space for “good enough.” 227 Enterprise was not unaware of this challenge, asking a simple question: What if refrigerant distribution was perfect? The answer was the MI Series – a carefully developed environment where precise copper joints, intelligent reducers and quality insulation not only live, but orchestrate. Each component is tuned to minimize the friction points that haunt traditional designs: installation delays are history, pressure inefficiencies vanish, thermal irregularities are no more. From the board rooms of OEMs to the field expertise of contractors, and the high requirements of global consultants, the MI Series has earned its reputation in 35+ countries as the system that does not compromise, does not fail, and does not settle. This is more than just a product. It’s our pledge that enterprise-grade performance need not come at a cost. Created from a passion with accuracy. Built to last. Born to lead.

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Product Faqs

What is the benefit of MI Series compared with standard branch piping?

The 227 Enterprise MI Series Branch Piping Kit has an enhanced distributor design for a smoother refrigerant flow channel to assist reduce refrigerant pressure loss, compared to traditional VRF branch piping. This results in more equal refrigerant distribution , increased system performance and improved energy efficiency . The MI Series also boasts simplified installation, fewer field joints and improved reliability, making it a perfect alternative for commercial, industrial and large-scale VRF HVAC applications.

What are the common uses of MI Series Branch Piping Kits?

MI Series Branch Piping Kits are typically utilized in commercial, industrial and residential VRF HVAC systems where efficient distribution of refrigerant and reliable system performance are critical. Typical uses include office buildings, hotels, hospitals, shopping malls, schools and universities, data centers, apartment complexes and mixed-use developments. 227 Enterprise VRF MI Series Branch Piping Kits are manufactured to OEM specifications, ensuring reliable performance for new installations and HVAC retrofit applications.

How can MI Series Branch Piping Kits save time in installation?

The 227 Enterprise MI Series Branch Piping Kit is engineered using a multi-step process that streamlines installation and reduces field fabrication. This reduces the need for cutting, fitting and brazing that is required with typical branch piping, enabling HVAC contractors to install quicker and more efficiently. This results in faster installation, more uniformity and even refrigerant distribution for commercial, industrial and residential VRF HVAC installations.

How can I select the proper MI Series model for my HVAC project?

Choosing the right MI Series Branch Piping Kit is easy. 227 Enterprise MI Series Branch Piping Kits are OEM compatible and compatible with the model numbers of the top VRF manufacturers’ standards. You can select the suitable model by the model number listed in your Single Line Diagram (SLD), project drawings or equipment schedule. Or you can find the right model by matching the inlet and exit pipe sizes with the parameters in our product catalog or technical specifications. If you require a MI Series Branch Piping Kit for your HVAC project, our technical experts can help you choose the perfect one.

What kind of insulation does MI Series Branch Piping Kits have?

Enterprise provides three types of insulation for VRF MI Series Branch Piping Kits: Cross-Linked Polyethylene (XLPE) insulation and Nitrile Butadiene Rubber (NBR) insulation, to satisfy various project demands and environmental conditions. This allows customers to select the most appropriate insulation depending on thermal performance, fire safety standards, operational conditions and project parameters. These insulation choices support improved energy efficiency, decrease condensation, and ensure long term performance in commercial, industrial and residential VRF HVAC applications.