Type A41 Valve

Sizes and End Connection Styles

■2, ■3, ■4, ■6, ■8, ■10, and ■12-inch valve sizes available in wafer or single flange style. 2-inch size is only available in wafer style. See figure 3 for typical valve dimensions.

Mating Flange Capabilities

All sizes compatible with appropriate Class 150. 2-Inch also compatible with Class 300 and 600 flanges (schedule 80 or lighter)

Valve Classification

Face-to-face dimensions of 3- through 12-inch sizes in Class 150, and meets API 609 or MSS SP-68 standards for face-to-face dimensions of wafer style valves

Maximum Inlet Pressures(1)

Carbon Steel and Stainless Steel Valve Bodies: Consistent with Class 150 pressure-temperature ratings per ASME B16.34 unless limited by material temperature capabilities. 2-inch is also consistent with
Class 600.

Maximum Pressure Drops(1)

Consistent with Class 150 and pressure/temperature ratings per ASME B16.34 except at some higher pressure/temperatures values. (See bulletin 21.1:A41)

Material Temperature Capabilities(1)

PTFE Seal: -46 to 232°C (-50 to 450°F)
2-Inch Metal Seal: -46 to 538°C (-50 to 1000°F)

Shutoff Classifications

PTFE Seals: No visible leakage for this bi-directional seal per MSS SP-61
2-Inch Metal Seal: Bidirectional shutoff. 0.001% of maximum valve capacity (1/10) of Class IV per ANSI/FCI 70-2 and IEC 60534-4. Pressure drop is 740 psig forward and 100 psig reverse.

Flow Coefficients

See the section titled Coefficients in this bulletin or Catalog 12.

Type 1035/El-O-Matic Actuator

Actuator Sizes

Double Acting: ■EDA 25, ■EDA 40, ■EDA 65, ■EDA 100, ■EDA 200, ■EDA 350,
■EDA 600, and ■EDA 950

Spring Return : ■ESA 25, ■ESA 40, ■ESA 65, ■ESA 100, ■ESA 200, ■ESA 350,
■ESA 600, ■ESA 950, and ■ESA 1600

Output Shaft: Recessed double D output insert for Type A41 valves

Dual Stop Adjustment: E Series actuators are furnished with dual stop adjustments (DSA) as a standard feature

See figure 2 for dimensions with Type A41 valve.

Supply Pressure(1) (Operating Pressure)

Double Acting and Spring Return: 2.8 to 8.3 bar (40 to 120 psig)

Temperature Range(1)

Standard: -20 to 79°C (-4 to 175°F) with Nitrile O-rings
Optional: High temperature: -20 to 121°C (-4 to 250°F) with fluorocarbon O-rings
Low temperature: -40 to 79°C (-40 to 175°F) with EPDM and special lubricant

Actuator Orientation

Standard: Parallel to the pipeline, Code A.
Optional: Code B, C and D (See bulletin 22.1:1035)

The A41 High Performance Butterfly Valve provides...

• Exceptional Shutoff—Patented bidirectional soft seal ring with pressure-assisting action results in exceptional shutoff rates as shown in the specifications.
• Shaft Retention—Redundant shaft retention provides added protection. The packing follower and shaft step interact to hold the shaft securely in the valve body.
• Easy Installation—The valve body self-centers on the line flange bolts as a fast, accurate means of centering the valve in the pipeline.
• Improved Environmental Capabilities—The optional ENVIRO-SEAL® packing system is designed with improved sealing, guiding, and loading force transmission. The ENVIRO-SEAL packing system can control emissions to below the EPA (Environmental Protection Agency) limit of 100 ppm (parts per million) for valves.
• Low Cost Maintenance—Individual disc/shaft components can be replaced after disassembly due to taper pin and hollow pin connections in the 3- through 12-inch sizes.

The 1035 Rack and Pinion Actuator provides...

• Three Point Suspension System—Three carbon filled PTFE guide bands provide a low friction bearing surface for piston alignment and rack support.
• Balanced Piston Design—As part of the design, three equally spaced bearing surfaces are cast into each piston. The rack and pinion construction results in even distribution of bearing loads.
• Dual Piston Design—Air pressure applies a balanced force across the common pinion gear.
• Multiple Constructions—Conversion from double acting to spring return, or vice versa, is simple and safe, thus reducing spare part requirements.
• Dual Stop Adjustment—This adjustment is standard on all E Series double acting and spring return actuators.

Emerson Process Management has assembled the accessories to the PSP based on their compatibility to the other items in the package, their quality level, and customer preference.
The PSP is available with several different PMV Positioners: P4, P5, and EP5. The solenoid valves available are all made by ASCO® (see table 2). The PSP can be ordered with an Airset (Type 67AFR-601 pressure filter regulator) that attaches onto the mounting bracket, if required.

Note
Neither Emerson, Emerson Process Management, nor any of their affiliated entities assumes responsibility for the selection, use and maintenance of any product. Responsibility for the selection, use, and maintenance of any product remains with the purchaser and end-user.