FLX202系列新型外壳采用316L、316、304材质,经过电解抛光,外表美观.内部中心齿轮采用强硬化处理的,强化镀镍处理.背部装有复合及导向环,动作精确,摩擦系数小,齿轮和高精度啮合,间隙小,输出功率大.采用精密压铸工艺制作的活塞保证了双活塞精确的对称性,双导轨则保证了输出扭距恒定.高强度采用表面锌处理,抗腐蚀能力强.

    顶部安装尺寸符合NAMUR标准,气源接口尺寸符合NAMUR标准,无需另装转接板,底部安装孔尺寸符合ISO5211、DIN3337标准,方便安装及回讯器等附件.

    此款气动执行器高强耐磨损,耐腐蚀,性能优越,适合于抗腐蚀要求极高的工况条件,尤其适用于海上钻井平台,造船,制药和食品卫生级等领域.

General

Material

Operation and Selection Guide

SPRING RETURN ACTUATOR TERMINOLOGY

1. AIR STROKE: When air is supplied to the actuator, the pistons compress the springs. The greater the spring compression, the less torque output the actuator can supply.

2. SPRING STROKE: When air is removed from the actuator, the stored energy in the springs forces the pistons inward. At full compression, the spring is at its maximum torque output. This is the SPRING START. When springs are uncompressed, this is the SPRING END.

3. FAIL POSITION: Standard FLOWX® actuators are preset for fail closed (CW) operation, but can be adjusted easily for fail open (CCW) rotation.

SPRING RETURN ACTUATOR SIZING (PLEASE SEE SPRING RETURN TORQUE CHART)

1. Establish the valve manufacturer’s seating torque (closing) and breakaway torque (opening). Add a 20% safety factor (e.g. a valve torque of 80 in. lbs. x 20% = 96in. lbs.).

2. Refer to the spring torque column and select the SPRING END TORQUE that equals or exceeds the required valve torque (i.e. the FLOWX® model BI-60 with a 80# spring set, which has an spring end of 112 in. lbs. and a spring start of 186 in. lbs.).

3. Determine the available air line pressure to the actuator (e.g. 80 P.S.I.). Refer to the 80 P.S.I. column and scan down to where it intersects with the BI-60 with an 80# spring. In this case, the end spring torque is 112 in. lbs,. which exceeds the required 96 in. lbs. required.

SPRING SET COMBINATION OPTIONS

SPRING SETS

All FLOWX® SS series (stainless steel) pneumatic actuators come standard with a complete spring pack (6 springs per side) sized for 80 PSI supply pressure unless otherwise specified. Actuators can be configured for different air supplies by removing springs from the end caps.

IMPORTANT: Springs must be arranged in a symmetrical manner (see arrangements to the left) so that side load does not occur between the pistons and the actuator body.

REVERSE OPERATION

All FLOWX® actuators are set for a standard CW to close, CCW to open rotation. The action may be reversed by rotating the pistons 180°.

CAUTION: Refer to FLOWX® operation and maintenance instructions before disassembly and removal of springs.

Double Acting Actuators

ACTUATOR OVERVIEW

•All listed output torques are expressed in inch pounds of torque (in. lbs.).

•Charts for available air pressure are expressed in pounds per square inch (P.S.I.).

•FLOWX® actuators offer ±4° adjustment in the open and closed positions on all models.

DOUBLE ACTING ACTUATOR SIZING (PLEASE SEE DOUBLE ACTING TORQUE CHART )

1. Establish the valve manufacturer’s breakaway or seating/unseating torque, then add 20% as a safety factor (e.g. 115 in. lbs. valve breakaway torque x 20% = 138 in. lbs.).

2. Determine available air pressure to the actuator (e.g. 60 P.S.I.).

3. Refer to the chart, find the 60 P.S.I. column and scan down until a torque value greater than the valve torque is found (e.g. 141 in. lbs.). Then go to the left to determine the FLOWX® model number. In this sample case, the selected actuator would be the FLOWX-45DA. NOTE: The FLOWX® double acting actuator has no torque drop through the full 90º stroke.