Submitted by divya on July 1, 2025

573 Flanged Segmented Ball Valve

Flanged segmented ball control valves suited for high flow, low pressure drop services.

1 to 24 inch NPS (25 to 600mm DN)
Flanged Body, Quarter Turn Operation
RF End Connection
ASME B16.34 Class 300 Pressure Rating
ANSI/FCI 70.2 and IEC 60534-4 Class II / IV / VI Shutoff

Model 573 segmented ball style control valves are used in all kinds of demanding applications, oil and gas production and chemical process industries. It is also well suited for high flow, low pressure drop service. The 573 is used in both throttling and on/off control of liquids or gases.

The straight through unrestricted flow path provides higher capacity than globe style valves. A splined shaft provides accurate control in throttling operations and flexibility in actuation options.

Overview

Metal Seating Standard - Soft Seats Available
Splined, Square and Keyed Shafts Available
Live Loaded Packing Available
NACE Options Available
Other Material Options Available

Product Specifications

573 Valve Specifications

573 Available Configurations

SIZE	END CONNECTION
	RF FLANGED CONNECTION
	ASME CLASS 300
1" NPS (25mm DN)	ü
1-1/2" NPS (40mm DN)	ü
2" NPS (50mm DN)	ü
3" NPS (80mm DN)	ü
4" NPS (100mm DN)	ü
6" NPS (150mm DN)	ü
8" NPS (200mm DN)	ü
10" NPS (250mm DN)	ü
12" NPS (300mm DN)	ü
16" NPS (400mm DN)	ü
20" NPS (500mm DN)	ü
24" NPS (600mm DN)	ü

573 Available Shutoff Classifications

AVAILABLE SHUTOFF CLASSIFICATION
VALVE TRIM		SHUTOFF CLASS
COMPOSITION BALL SEAL		CLASS VI
METAL BALL SEAL		CLASS IV
FLOW RING		5% OF VALVE CAPACITY AT FULL TRAVEL
NOTES:	Classes and testing per ANSI/FCI 70-2 and IEC 60534-4.
	Tested at the service pressure drop, or 50 Psig (3.4 BARG), whichever is lower.