Submitted by divya on May 29, 2025

320 Series

320 AxFlo Trim is a high resistance, multi-stage, axial flow path trim to combat erosive service.

2 to 8 inch NPS (50 to 200mm DN)
Globe Body Style
RF | RTJ | NPT | BWE | SWE Available End Connections
ASME B16.34 Class 300 / 600 / 900 / 1500 Pressure Rating
ANSI/FCI 70.2 and IEC 60534-4 Class V Shutoff

320 AxFlo Anti-Cavitation trim is a heavy duty dirty service trim option designed for entrained particulate and high pressure drop applications. AxFlo trim offers multi-stage protection against cavitation and erosion.

You can expect enhanced trim life when using AxFlo trim because pressure gets distributed over the length of the valve plug across multiple STAGES. Each STAGE is not exposed to the full pressure differential, and on properly sized 320 valves, the amount of pressure drop per STAGE is controlled to prevent cavitation.

Overview

320 Series

Principles of Operation

Dyna-Flo 320 AxFlo trim is a high resistance, multi-stage, axial flow path trim, which means process fluid will flow through AxFlo valves parallel to the axis of the plug and cage.
This design is well suited to reduce clogged flow passages in applications involving fluids with entrained particles.

You can expect enhanced trim life when using AxFlo trim because pressure gets distributed over the length of the valve plug across multiple Stages, this means each Stage is not exposed to the full pressure differential. On properly sized 320 valves, the amount of pressure drop per Stage is controlled to prevent cavitation problems and to minimize erosion issues.

Metal Seating Standard
Live Loaded Packing Available
Other Material Options Available

Product Specifications

320 Valve Specifications

320 Available Configurations

AVAILABLE CONFIGURATIONS
BODY	ASME CLASS & TRIM TYPE	SIZE	END CONNECTION
BODY	ASME CLASS & TRIM TYPE	SIZE	RF AND RTJ (FLANGE CONNECTION)	BWE	SWE	NPT
GLOBE	ASME CLASS 300 & 600 AXFLO 3-STAGE	2" NPS (50mm DN)	✔	✔	✔	✔
	ASME CLASS 300 & 600 AXFLO 3-STAGE	3, 4, 6 & 8" NPS (80, 100, 150 & 200mm DN)	✔	✔	✔	✖
	ASME CLASS 900 & 1500 AXFLO 4-STAGE	2" NPS (50mm DN)	✔	✔	✖	✖
		3, 4, 6 & 8" NPS (80, 100 & 150mm DN)	✔	✔	✖	✖

320 Available Shutoff Classifications

AVAILABLE SHUTOFF CLASSIFICATION
VALVE SIZE	VALVE TRIM TYPE	SHUTOFF CLASS
ALL	ALL	CLASS V

320 Standard Body Materials

LCC (A350-LF2 OPTIONAL BONNET MATERIAL)
WCC (A350-LF2 OPTIONAL BONNET MATERIAL)
CF8M (A182-F316 OPTIONAL BONNET MATERIAL)

320 Available Flow Characteristics

CHARACTERISTIC	PREFERRED FLOW DIRECTION
LINEAR - ANTI-CAVITATION	FLOW UP

AxFlo trim is designed to have no significant flow for the first 15% of travel, this design feature is in place to maximize the life of the seat ring.

The multi-stage clearance flow design helps prevent high pressure drops in the seating area during throttling at low capacity. By preventing these high pressure drops, we can significantly extend the shutoff capability while simultaneously enhancing the throttling control at low travels.

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