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DIXON 1-1/4 MP 520-H SERIES INT EXP SCOV

Description & Features

The Dixon 1-1/4 MP 520-H Series Internal Expansion Scovill Coupling is engineered for secure connectivity in industrial settings. Its design incorporates a Scovill style permanent MNPT coupling ensuring precision and durability in demanding environments.

This coupling simplifies installation as no additional calibration or adjustment is required. The lack of a check valve highlights its reliability and its construction without color coding makes it versatile for various applications.

By omitting a switch connector and diode this component emphasizes mechanical strength. Additionally it is crafted without the necessity for a mandrel reducing complexity while enhancing usability.

Supplier Part Number: H5222-A

Specifications

Alternate Part Numbers Alternate Part Number C1FW12	Brand Dixon Valve & Co	Brand Dixon Valve & Co	Pack Size 1.00	UOM EA	Supplier Part Number H5222-A	Product Weight 0.52 lbs

Product Questions & Answers (2)

Question by: Phil F on Sep 7, 2025, 4:01 PM

got a 1-1/4 MNPT setup already. is this the kind of coupling that threads right on, or am I missing something?

Answer by: Customer Support on Sep 9, 2025, 6:41 AM

With the Scovill style permanent MNPT connection, it is meant to mate to an MNPT threaded setup in a 1-1/4 size. It is built as a permanent coupling, so it is focused on a secure threaded connection rather than a quick swap style.

Question by: Roger R on Aug 4, 2025, 9:22 AM

No check valve on this thing, is that gonna be a problem for how I'm planning to use it, or is that just standard for this style of coupling?

Answer by: Customer Support on Aug 5, 2025, 9:24 PM

For Scovill style permanent couplings like this one, the absence of a check valve is completely normal and expected. These are built for fixed, permanent connections rather than quick-disconnect applications where a check valve would prevent fluid backflow during separation. If your setup doesn't require disconnection under pressure, you won't miss it one bit.