Dresser Masoneilan Products

Regulators
525-526 Series	535V-535H Series	170-171 172-173 Series	174 Series
Sizes: ½" through 4" (15 through 100 mm)	Sizes: ¾" through 2" (15 through 50 mm)	Sizes: ¼" through 2" ½" (6 through 50 mm)	Sizes: ½" through 1-1/2" (15 through 40 mm)
Ratings and Connections: flanged: ANSI 150 - 600 UNI-DIN 10 -100 screwed: NPT 15 - 50 mm welded: BW or SW	Ratings and Connections: flanged: ANSI 150 - 600 UNI-DIN 10 -100 screwed: NPT welded: SW	Ratings and Connections: flanged: ANSI 150 - 600 UNI-DIN 10 - 100 screwed: NPT welded: SW	Ratings and Connections: screwed: NPT
Body Materials: carbon steel stainless steel chrome-moly	Body Materials: carbon steel stainless steel chrome-moly	Body Materials: cast iron carbon steel stainless steel	Body Materials: carbon steel
Actuator: model 10900 with spring-opposed spring-opposed diaphragm	Actuator: model 10900 with spring-opposed spring-opposed diaphragm	Actuator: sizes 80 through 515 spring opposed diaphragm	Actuator: integral spring diaphragm
Trim: disc plug, double seat	Trim: single seat, disc plug (535H Series)	Trim: single seat, disc plug hard (metal) and soft (elastomer) seat options	Trim: single seat, disc plug elastomer disc for tight shutoff
Working Range: 0.5 to 330 psi (0.034 to 22.7 bar)	Working Range: 0.5 to 330 psi (0.034 to 22.7 bar)	Working Range: 0.035 psi to 667 psi (0.0024 to 46 bar)	Working Range: 1.4 inches W.C. to 8.8 psi (3.4 mbar to 0.61 bar)
The 525 Series regulators are designed for pressure reduction, and the 526 Series for back pressure applications. Also available for differential pressure applications in multiple configurations to meet various combinations of capacity, pressure, and temperature requirements.	The 535V and 535H series are designed in multiple configurations for pressure reduction and differential pressure applications.	The 170 through 173 series are a line of pressure reducing and relieving (back pressure) and differential pressure regulators for industrial liquid, steam and gas applications.	The 174 series is a low pressure regulator designed for precise control of gas services. Available in both pressure reducing and pressure relieving (back-pressure) constructions for industrial air and gas applications.