Autoclave Engineers Actuators 20SM4 Series Angle Valve (Fail Close)

 Autoclave Engineers 20SM series needle valve, 2 way angle pattern with replaceable seat incorporating O1S - O2S medium duty fail open actuator, 1/4 inch MP, vee stem, 316SS, MWP 20,000 psi

Six sizes of air operators (light, mini-light, medium, heavy duty or extra heavy, single and double stage) are offered for remote on-off operation or automatic operation of Parker Autoclave Engineer’s low, medium or high pressure valves. The actuators are available in air-to-open (normally closed) and air-to close (normally open) designs.

 Piston Type Valve Actuators

Piston type air-operated valves offer a unique, reliable design providing for a long and dependable life. These actuators are quick acting, typically less than one (1) second activation time (Dependent on air flow rate to piston and process pressure required at valve inlet)) and long lasting (tested to over 100,000 cycles).

Parker Autoclave Engineer’s piston type actuators feature

•  Air-to-Open (Inlet Pressure may be required) or Air-to-Close with spring return or Dual Acting (no spring) Options
•  Anodized Aluminum Piston and Housing (100 psi max)
• Yoke design for separation of process and air drive sections for safety †
• Ease of stem replacement
• Stem position indicator is standard†
•  High actuator cycle life with lifetime lubrication
•  1/8” NPT air inlet connection except Extra Heavy duty has 3/8” NPT
• Single or Dual (Open & Close) Limit Switch options are available in Weatherproof, Explosionproof (Class 1, Division 1, Groups C & D, Temp. Group T6) versions. Consult Factory

To select Air-to-Open Needle Valve Actuator (fail close)

Example:

• Need to know: Valve Model/Connection Size - 20SM4072 Needle Valve
• Indoor or Outdoor Service - Outdoor Service
• Maximum Operating Pressure: Fluid - 12,000 psi
• Maximum Available Air Pressure - 60 psi
• Select Actuator Type : Air-to-Open type (Normally Close - fail close)

Example: Using chart on page 6 (Air-to-Open Actuators), select 20SM4 Section Across top of chart, select 12 Ksi System Pressure (12,000 psi max system pressure) Go down that column to 20SM4 Section to first row filled with number (air pressure) First row with number is 55 – as your available air pressure is 60 psi, you do not have to go any further (if this number was more than 60, continue to next row)
This row (Heavy Duty Actuator) confirms that this actuator needs 55 psi to close the 20SM4 valve at 12,000 psi and you have 60 psi available. Suffix code for this actuator can be found on table below  find “Heavy Duty - Air to-Open” - Suffix code is “-O1SOD”, remembering the Service location was “Outdoor” - add this suffix to the 20SM4 body style of your choice. Example: 20SM4072-O1SOD

* Maximum pressure rating is based on the lowest rating of any components. Actual working pressure may be determined by tubing pressure rating, if lower.
** Cv data is for 2-way straight valves. For angle pattern add approximately 50% to the Cv value.
*** Cv varies because of spring compression limitations. The flow coefficient range is given for the maximum stem travel (lowest system pressure) to minimum travel (highest system pressure).
For more details see the manual here

CAUTION: While testing has shown O-rings to provide satisfactory service life, both cyclic and shelf life may vary widely with differing service conditions, properties of reactants, pressure and temperature cycling and age of the O-ring, FREQUENT INSPECTIONS SHOULD BE MADE to detect any deterioration, and O-rings replaced as required. *Maximum pressure rating is based on the lowest rating of any component. Actual working pressure may be determined by tubing pressure rating,if lower.

Air Operated Materials

Cylinder, piston, cover plates, spring housing: Anodized aluminum (for corrosion and wear resistance).
Yoke: Painted Steel. On request the housing (cylinder) is available in steel from different company

Technical Data

Air Operator

• Maximum allowable working pressure: 100 psi (6.89 bar)
• Allowable piston temperature range: -20°F to 200°F (-29°C to 93°C), operating below 30ºF (-1.1ºC) with dry air only (heat trace may be needed for lower temperatures).

Area of piston

• Light duty - 4.9 sq. in (31.6 sq. cm)
• Mini-Light duty - 5.4 sq. in (34.8 sq. cm)
• Medium duty - 19.6 sq. in (126.5 sq. cm)
• Heavy duty - 39.2 sq. in (252.9 sq. cm)
• Extra Heavy duty single stage - 56 sq. in (361.3 sq. cm)
• Extra Heavy duty double stage - 112 sq. in (722.6 sq. cm)

Approximate air usage/cycle @ 100 psi (6.89 bar) - For Dual Acting, double air usage shown below:

• Light duty - .003 SCF (.00008 SCM)
• Mini-Light duty - .007 SCF (.0002 SCM)
• Medium duty - .04 SCF (.0011 SCM)
• Heavy duty - .08 SCF (.0022 SCM)
• Extra Heavy duty single stage - .33 SCF (.0095 SCM)
• Extra Heavy duty double stage - .67 SCF (.019 SCM)

Tested to 100,000 cycles at 100 psi (6.89 bar) with no leakage or signs of wear or fatigue.