Dresser Masoneilan Products

Severe Service Control Valves
49000 Series Globe and Angle Style with Lo-dB or V-Log® Trim	79000 Series Angle Style with VRT® Trim	84000 Series SteamForm®
Sizes: 4" through 36" (100 mm through 900 mm)	Sizes: 1" through 6" (25 through 150 mm)	Trim Sizes: 3" through 24" (80 through 600 mm) Pipe Sizes: 3" through 48" (80 through 1200 mm)
Ratings and Connections: flanged: ANSI 150-2500 UNI-DIN 10 - 400 welded: BW	Ratings and Connections: flanged: ANSI 600 - 2500 UNI-DIN 100 - 400 welded: BW	Ratings and Connections: flanged: ANSI 150 - 2500 UNI-DIN 10 - 400 welded: BW
Body Materials: carbon steel stainless steel chrome-moly	Body Materials: carbon steel stainless steel chrome-moly	Body Materials: carbon steel chrome-moly
Actuator: model 37/38 spring-opposed diaphragm model 87/88 multi-spring-opposed diaphragm cylinder actuators	Actuator: model 87/88 multi-spring diaphragm model 37/38 spring diaphragm cylinder actuators	Actuator: model 87/88 multi-spring diaphragm model 37/38 spring diaphragm cylinder actuators
Trim: single or double stage Lo-dB and V-Log energy management trim available in low noise flow-to-open designs or anti-cavitation flow-to-close variety of balanced trim options for Class IV and V shutoff	Trim: multi-stage VRT trim design and VRT partial stack design for control over a wide rate of applications	Trim: single or double stage Lo-dB with optional diffuser, and V-Log energy management trim available with thermally compensating high temperature trim options for long life in high-cycling environments variety of balanced trim options for Class IV and V shutoff
Inherent Characteristic: linear or equal percentage	Inherent Characteristic: linear	Inherent Characteristic: linear or equal percentage
The 49000 Series is designed with enlarged body galleries to accommodate large stroke lengths and up to 36-stages of pressure reduction. Specific applications: boiler feed water start-up & control, steam letdown, pump discharge, water reinjection, gas recycle and vent applications.	The 79000 Series valves is designed for anti-cavitation service with control over a wide range of operating conditions, such as the ramp up transition of a normal feedwater pump. Specific applications: feedwater control feedwater pump start-up valve	The 84000 Series SteamForm is designed with a wide range of features including a patented water injection system for best performance in steam conditioning applications. Specific applications: turbine bypass process steam conditioning