Fisher 657 and 667 Size 30i - 76i Diaphragm Actuators

1 657 and 667 Size 30i - 76i DiaphragmActuatorsFisher 657 and 667, size 30i to 76i, spring-opposeddiaphragm Actuators position the valve plug in thevalve in response to varying controller or valvepositioner pneumatic output signals applied to theactuator Diaphragm . Zero setting of the actuator isdetermined by the compression of the actuator spring,and span is set by the actuator spring rate. The 657actuator is direct-acting; the 667 is Actuators are designed to provide dependableon-off or throttling operation of control Improved Ease of Use-- Integral mounting pad forFisher FIELDVUE DVC2000 and DVC6200 digitalvalve controllers eliminates the traditionalmounting bracket and reduces the number of partsrequired to Integral Air Passage-- Fisher 667 size 30i through 76iactuators incorporate an integral air passage thateliminates the need for external tubing and fittingswhen paired with a DVC2000 or Backwards Compatible-- Both 657 and 667 arecompatible with instruments that utilize traditionalbracket-based mounting kits.

2 The 667 can beexternally tubed for instruments or accessorieswhen Application Versatility-- Spring rates, travel stops,and manual operators are available for nearly anycontrol valve Excellent Linearity Between Loading Pressure andTravel-- A molded Diaphragm travels in a deepdiaphragm casing, minimizing area changethroughout the 657 and 667 Size 30i - 76i ActuatorsMounted on easy-et ValvesX1175X1182n High Degree of Dynamic Stability and FrequencyResponse-- A shallow casing on the pressure sidemeans reduced volume on that side, therebyminimizing response High Thrust Capability-- The molded diaphragmallows maximum thrust for given Diaphragm Long Service Life-- Rugged thick-walled cast ironand steel construction provides increased stabilityand corrosion and 667 Size 30i - 76iD104018X012 Product :657 Size iSeptember 2017657 and 667 Size 30i - 76iD104018X012 Product :657 Size iSeptember 2017 2 SpecificationsStandard Operating Pressure Range(1)657 and 667: to bar (3 to 15 psig) or bar (6 to 30 psig)657-4 and 667-4: to bar (3 to 27 psig)667 Size 76i.

3 To bar (6 to 30 psig) or J0 bar (0 to 45 psig)Maximum TravelSee table 2 Output IndicationStainless steel disk or pointer and graduated scaleStroking SpeedDependent on actuator size, travel, spring rate, initialspring compression, and supply pressure. If strokingspeed is critical, consult your Emerson sales office orLocal Business Partner .Maximum Allowable Thrust(2)See table 2 Operating Temperature Range(1)Standard Construction (Nitrile Elastomers): -40 to82_C (-40 to 180_F)Optional Construction (Silicone Diaphragm ) andEthylene Propylene (EPDM) or Fluorocarbon (FKM)O-rings): -40 to 149 C (-40 to 300 F)Optional Cold Service Construction: -60 to 82_C (-72to 180_F)This construction is suitable for cold climate regionsper GOST 15150.

4 Note that current SIL certification isonly relevant for standard temperature your Emerson sales office or Local BusinessPartner for Valve Packing Box Temperature: 427_C(800_F) with cast iron yokeVolumetric DisplacementSee table 1 Signal ConnectionsSizes 30i - 60i and 667 Size 76i: 1/4 NPT internalSize 70i: 1/2 NPT signal connections availableEffective Diaphragm AreaSee table 2 Construction Materials (refer to figure 1) Diaphragm CasingSizes 30i - 76i: SteelDiaphragmSizes 30i - 76i: JNitrile on nylon, JSilicone onpolyester, JEPDM on aramid, JFKM on aramidDiaphragm Plate657 Sizes 30i- 60i: JCast aluminum657 Size 70i: JCast iron or Jsteel667 Sizes 30i- 60i and 76i: JCast aluminum667 Size 70i: JCast iron or JsteelActuator Spring: SteelSpring Adjustor: SteelSpring Seat: JCast iron or JsteelActuator Stem: SteelTravel Indicator: Stainless steelO-Rings: , JNitrile, JEPDM, or JFKMSeal Bushing667 Sizes 30i- 60i: JBrass667 Sizes 70i - 76i: JGlass-filled PTFE or JBrassStem Connector: Zinc-plated steelYokeSizes 30i - 76i: Cast iron onlyStem and Yoke Boss DiametersSee table 2 Approximate WeightSee table 31.

5 The pressure and temperature limits in this bulletin and in any applicable standard or code limitation should not be Do not exceed the thrust limits in this Configurations Instrument Mount Information Specifications Casing Displacement actuator Weights (w/o handwheel) Capabilities Specifications Travel Stop Styles and 667 Size 30i - 76iD104018X012 Product :657 Size iSeptember 2017 3 Available ConfigurationsDirect ActionAll 657 Actuators are direct acting. Applying airpressure to the upper Diaphragm casing forces theactuator stem downward. When this pressure isreduced, the opposing spring force moves theactuator stem upward. Should the loading pressurefail, the spring forces the stem to the extreme upwardposition.

6 This provides fail-open action forpush-down-to-close valves and fail-closed action forpush-down-to-open A direct-acting actuator used on sliding-stemvalves. Available in sizes 30i through 70i. See figure A 657 actuator in size 70i, designed with 102mm (4-inch) ActionAll 667 Actuators are reverse acting. Applying airpressure to the lower Diaphragm casing forces theactuator stem upward against the opposing springforce. When this loading pressure is reduced, thespring moves the actuator stem downward. Shouldthe loading pressure fail, the spring forces the stem tothe extreme downward position. These actuatorsprovide fail-closed action for push-down-to-closevalves and fail-open action for A reverse-acting actuator used on sliding-stemvalves.

7 Available in sizes 30i through 76i. See figure A 667 actuator in size 70i, designed with 102mm (4-inch) Instrument MountFisher 657 and 667 size 30i through 76i actuatorsfeature an integral mounting pad for the DVC2000 andDVC6200 (see figure 1). Only a few parts are requiredto mount these FIELDVUE instruments to the size i,resulting in a fast and simple mounting 667 size 30i through 76i Actuators feature anintegral air passage that eliminates the need for tubingand fittings when paired with a DVC2000 or 667 retains an external air connection forapplications and instruments or accessories thatrequire external for Diaphragm Actuators are often used asadjustable travel stops. They also provide a readymeans of positioning the control valve in anemergency.

8 The specifications in tables 6 and 7 applyto handwheels on both 657 and 667 Actuators . Forrepeated or daily manual operation, the unit should beequipped with a side-mounted Handwheels Typical 657 and 667actuators with handwheels mounted on thediaphragm casing are shown in figure 5. On the 657actuator, the handwheel can be set to limit the travelin the upward direction; on the 667 actuator , travel inthe downward direction can be restricted. A P-2 travelstop (figure 5) is available for a 667 actuator , sizes45i-60i to limit travel in either the upward ordownward directions. An actuator with a P-2 travelstop is limited to a maximum travel of 19mm ( ).Clockwise rotation of the handwheel on the 657actuator moves the actuator stem downward,compressing the spring.

9 Spring action returns thestem as the handwheel is turned the 667 actuator , counterclockwise rotationmoves the stem upward, and spring action returns thestem on clockwise Handwheels Figure 3 shows theside-mounted handwheels (designated by the lettersMO) available in sizes 34i through 60i on 657 and 667actuators. Size 30i Actuators do not have aside-mounted handwheel side-mounted handwheels can be used to strokethe valve in either direction at any point in the actuatorstem travel. Unlike the top-mounted handwheel, theside-mounted handwheel can be positioned to limittravel in either direction, but not both at the sametime. With the handwheel in the neutral position,automatic operation is possible throughout full valvetravel.

10 In any other position, valve travel will berestricted. The handwheel is furnished with aspring-loaded ball detent which prevents vibrationfrom changing the Travel StopsTop-mounted adjustable travel stops are available for657 and 667 Actuators . They are used to limit travel in657 and 667 Size 30i - 76iD104018X012 Product :657 Size iSeptember 2017 4the up, down, or up and down directions. Figure 7illustrates the different constructions. Table 5 definesavailability of the different style constructions withactuator type and such as transducers, positioners, positiontransmitters, air relays, volume boosters, switchingvalves, lockup valves, limit switches, and solenoidvalves are also available for actuator mounting. Theyare described in separate publications.