Pneumatic Valve Actuation Compact Actuators that Provide Reliable Remote Control 30 Crane Process Flow Technologies Saunders EC and SSC Pneumatic Actuators facilitate remote operation of the valve, as an integral part of a control system. Both are compact piston style actuators with excellent chemical and temperature resistance. The versatile and robust design derived from the use of high technology materials of construction, results in an actuator suitable for a wide range of process industry applications. EC Actuator mounted on A Type PFA lined valve SSC With the same flexibility as the EC Actuator, the SSC has been manufactured with a 316C12 stainless steel investment cast housing. Suitable for both aseptic and industrial applications the SSC has excellent resistance to both chemical and steam duties. Size range DN8 – DN50 All three operation modes, double acting, spring to close and spring to open feature the same physical dimensions for a given valve size. This provides uniform compact envelope dimensions and outstanding economic benefits particularly for spring return failsafe actuation. Field conversion of manual valves to power actuation is readily achieved ‘in-line’ without special tools or modification. SSC Actuator EC The EC is manufactured by injection moulding PES (polyethersulphone), which has a temperature range of -10° to +100°C ambient (autoclave maximum 150°C). Actuators can be supplied as spring close, spring open or double acting with various spring pack options for a variety of pressure requirements. Size range DN8 – DN50
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Pneumatic Valve ActuationCompact Actuators that Provide Reliable Remote Contro l
30 Crane Process Flow Te c h n o l o g i e s
Saunders EC and SSC Pneumatic Actuators facilitate remote operation ofthe valve, as an integral part of a control system. Both are compactpiston style actuators with excellent chemical and temperature re s i s t a n c e .
The versatile and robust design derived from the use of high technologymaterials of construction, results in an actuator suitable for a wide rangeof process industry applications.
EC Actuator mounted onA Type PFA lined valve
SSC
With the same flexibility asthe EC Actuator, the SSChas been manufacture dwith a 316C12 stainlesssteel investment casthousing. Suitable for bothaseptic and industrialapplications the SSC hasexcellent resistance toboth chemical and steam duties.
Size range DN8 – DN50
All three operationmodes, double acting,spring to close andspring to open featurethe same physicaldimensions for a givenvalve size. This pro v i d e su n i f o rm compactenvelope dimensions andoutstanding economicbenefits particularly forspring re t u rn failsafeactuation.
Field conversion ofmanual valves to poweractuation is re a d i l yachieved ‘in-line’ withoutspecial tools orm o d i f i c a t i o n .
SSC Actuator
EC
The EC is manufacture dby injection mouldingPES (polyethersulphone),which has a temperaturerange of -10° to +100°Cambient (autoclavemaximum 150°C).Actuators can besupplied as spring close,spring open or doubleacting with various springpack options for a varietyof pre s s u re re q u i re m e n t s .
Size range DN8 – DN50
Pneumatic Valve ActuationCompact actuators that pro v i d ereliable remote contro l
31
S a u n d e r s
ECX
Available in springclose, spring open anddouble acting modes ofoperation to suitp rocess needs. A widerange of optionsincluding switches,positioners, limit stopand visual open/closeindication are alsoa v a i l a b l e .
Size range: DN65 – DN150
ECX Actuator with visual indicator
ECX
Saunders ECX typeactuators are designedto offer an extension tothe EC size range whilststill maintaining thecompact envelope size.The housing ism a n u f a c t u red in coatedsilicon aluminium fori n c reased chemicalresistance and long life.With the extensiveflexibility in spring packswe can offer an actuatorto suit a wide range ofp re s s u re and flowv a r i a t i o n s .
ECX Actuator with switchbox and integralsolenoid
Pneumatic Valve ActuationEV and ES A c t u a t o r s
32 Crane Process Flow Te c h n o l o g i e s
ESspring close
EVspring close
The EV/ES actuator offers efficient mechanical/pneumatic control ofthe diaphragm, allowing remote and automated operation.
Saunders EV/ES actuators are designed with close coupled bonnetassemblies and have complete flexibility of perf o rmance. Several diff e re n tactuator models may be provided for each valve size to suit diff e rent lineand operating pre s s u res. The range allows valve closure against themaximum valve working pre s s u res and can be successfully used formodulating control duties in addition to more normal isolation functions.
Failsafe closing actuators are fully adjustable, i.e. spring compression canbe externally adjusted to provide optimum diaphragm forces and hencep rovide extremely long diaphragm life in serv i c e .
Many accessory options are available which include solenoid valves,remote indication devices (switches or sensors) to suit enviro n m e n t a lconditions such as hazardous services. Limit stops and positioners andmany other devices may be off e red to allow usage within part i c u l a rc o n t rol systems. EV/ES actuators are provided with a tough polyester coating which gives maximum durability, even in exposed locations.
Saunders diaphragm valves off e rexcellent control capabilities within ab road range of pre s s u re, flow or levelc o n t rol applications.
Rangeability (ratio of maximum flow vs. minimumc o n t rol flow) of Saunders weir type valves is 35:1extending beyond the range of most pro c e s sand service control systems.
The positive shut-off characteristics of the valvecan, in many instances, eliminate the need forindependent block valves, a major component inthe piping system cost.
The inherent flow characteristics illustratedshows linearity up to 60% of travel (80% of flow).
The chart illustrates installed characteristicsa ffected by the dynamic friction loss for theremainder of the piping system. Equal %characteristics can be obtained through the useof characterised positioners.
P re s s u re re c o v e ry factor = 0.7.
Pneumatic Valve ActuationValve Throttling and Flow Contro l
33
S a u n d e r s
% flow/% travel, weirtype diaphragm valve
Hysteresis for weirtype diaphragm valve
fitted with actuatorplus valve positioner
Diaphragm valvecharacteristic curves
Actuator with digitalfoundation fieldbuspositioner
T E C H N I C A L D ATA
EC Pneumatic Actuators DN8 -- D N 5 0Materials of Constru c t i o n
34 Crane Process Flow Te c h n o l o g i e s
EC Spring Opening
EC Spring Closing
ECDouble Acting
1234
5
6
7
8
12
13
14
15
16
17
18
12
91011
34
5
6
7
12
13
14
15
16
17
18
123
4
8
9
10
11
12
13
14
567
8
91011
Item Component MaterialMATERIALS OF CONSTRUCTION EC/SC
1 Indicator seal Fluoroelastomer2 Cap washer PES (DN8-DN25) IXEF (DN40-DN50)3 Cap PES (DN8-DN25) IXEF (DN40-DN50)4 Loading plate Mild steel5 Outer spring Steel6 Inner spring Steel7 Bonnet cap ‘O’ ring Nitrile8 Indicator IXEF9 Outer piston seal Fluoroelastomer
10 Piston PES (DN8-DN25) IXEF (DN40-DN50)11 Inner piston seal Nitrile12 Bonnet washer PES13 Spindle seal Fluoroelastomer14 Spindle PES15 Bonnet insert PES (DN40-DN50)16 Bonnet PES17 Line diaphragm Rubber, Rubber/PTFE18 Compressor Mazak (DN8),
Item Component MaterialMATERIALS OF CONSTRUCTION EC/SO
1 Indicator IXEF2 Indicator seal Fluoroelastomer3 Cap washer PES (DN8-DN25) IXEF (DN40-DN50)4 Cap PES (DN8-DN25) IXEF (DN40-DN50)5 Outer spring Steel6 Inner spring Steel7 Bonnet cap ‘O’ ring Nitrile8 Spring support plate PES9 Outer piston seal Fluoroelastomer
10 Piston PES (DN8-DN25) IXEF (DN40-DN50)11 Inner piston seal Fluoroelastomer12 Bonnet washer PES13 Spindle seal Nitrile14 Spindle PES15 Bonnet insert PES (DN40-DN50)16 Bonnet PES17 Line diaphragm Rubber, Rubber/PTFE18 Compressor Mazak (DN8),
Item Component MaterialMATERIALS OF CONSTRUCTION EC/DA
1 Indicator seal Fluoroelastomer2 Cap washer PES (DN8-DN25) IXEF (DN40-DN50)3 Cap PES (DN8-DN25) IXEF (DN40-DN50)4 Indicator IXEF5 Outer piston seal Fluoroelastomer6 Piston PES (DN8-DN25) IXEF (DN40-DN50)7 Inner piston seal Fluoroelastomer8 Bonnet washer PES9 Spindle seal Nitrile
10 Spindle PES11 Bonnet PES12 Bonnet insert PES (DN40-DN50)13 Line diaphragm Rubber, Rubber/PTFE14 Compressor Mazak (DN8),
SSC (Stainless Steel) Compact Pneumatic Actuators DN8 -- D N 5 0Materials of Constru c t i o n
35
S a u n d e r s
SSC Spring Closing
12
3
4
5
6
7
11
12
13
14
15
89
10
161718
Item Component MaterialMATERIALS OF CONSTRUCTION SSC/SC
1 Indicator seal Viton2 Cap Stainless Steel3 Outer spring Steel4 Inner spring Steel5 Indicator IXEF6 Bonnet cap ‘O’ ring Nitrile7 Bonnet Stainless Steel8 Outer piston seal Fluoroelastomer9 Piston inner ‘O’ ring Nitrile
10 Piston PES (DN8-DN25) IXEF (DN40-DN50)11 Spindle PES12 Spindle ‘O’ ring Fluoroelastomer13 Thrust pad Nylatron (DN8-DN20)14 Line diaphragm Rubber, Rubber/PTFE15 Compressor Stainless Steel16 Body/bonnet nut Stainless Steel17 Body/bonnet washer Stainless Steel18 Body/bonnet bolt/stud Stainless Steel
Item Component MaterialMATERIALS OF CONSTRUCTION SSC/SO
1 Indicator seal Viton2 Cap Stainless Steel3 Outer spring Steel4 Inner spring Steel5 Indicator IXEF6 Bonnet cap ‘O’ ring Nitrile7 Bonnet Stainless Steel8 Outer piston seal Fluoroelastomer9 Piston inner ‘O’ ring Nitrile
10 Piston PES (DN8-DN25) IXEF (DN40-DN50)11 Spindle PES12 Spindle ‘O’ ring Fluoroelastomer13 Thrust pad Nylatron (DN8-DN20)14 Line diaphragm Rubber, Rubber/PTFE15 Compressor Stainless Steel16 Body/bonnet nut Stainless Steel17 Body/bonnet washer Stainless Steel18 Body/bonnet bolt/stud Stainless Steel
Item Component MaterialMATERIALS OF CONSTRUCTION SSC/DA
1 Indicator seal Viton2 Cap Stainless Steel3 Indicator IXEF4 Bonnet cap ‘O’ ring Nitrile5 Bonnet Stainless Steel6 Outer piston seal Fluoroelastomer7 Piston inner ‘O’ ring Nitrile8 Piston PES (DN8-DN25) IXEF (DN40-DN50)9 Spindle PES
10 Spindle ‘O’ ring Fluoroelastomer11 Thrust pad Nylatron (DN8-DN20)12 Line diaphragm Rubber, Rubber/PTFE13 Compressor Stainless Steel14 Body/bonnet nut Stainless Steel15 Body/bonnet washer Stainless Steel16 Body/bonnet bolt/stud Stainless Steel
SSC Spring Opening
SSC Double Acting
12
3
4
5
6
7
11
12
13
14
15
12
3
4
5
9
10
11
12
13
678
8910
161718
141516
T E C H N I C A L D ATA
ECX Pneumatic Actuators DN65 -- D N 1 5 0Materials of Constru c t i o n
36 Crane Process Flow Te c h n o l o g i e s
ECX Spring Closing
ECX Spring Opening
ECX Double Acting
12
3
4
5
6
7
8
9
10
11
13
14
15
16
123
4
10
11
1213
1415
16
1920
21
17,18
10
11
1213
1415
1617
2021
22
12
3
45
18,19
6789
17
1819
242526
1220212223
222324
232425
1
2
3
Item Component MaterialMATERIALS OF CONSTRUCTION ECX/SC
1 Plug Polyethylene2 Cover Silicon aluminium3 Upper spring plate SGiron4 Outer spring Steel5 Middle spring Steel6 Inner spring Steel7 Spring retaining bolt Mild steel8 Diaphragm plate Forged steel9 Operating diaphragm Rubber
Dimension table shows in mm diameter/width of actuators and the maximum heightof the actuator from the centre of the valve flange or pipeline.
∆ = Actuator Diameter/Width H = Actuator Height
ESC 61-65 ESO 68-72 ESDA 54-58
EVC 61-64 EVO 68-71 EVDA 54-57H
S a u n d e r sSaunders Diaphragm ValvesTypical Applications
The table shows typical application areas for Saunders diaphragm valves under four categories,Abrasive, Corrosive, Industrial and Aseptic.
A b r a s i v e
◆ Minerals pro c e s s i n g ,chemicals, fert i l i s e r s ,china clay, paper,power generation aresome of the industriesthat rely on SaundersKB Type diaphragmvalves to withstand awide variety of abrasives e rvice conditions.
◆ O res – phosphate ro c kor bauxite in aggre g a t ef o rm, slurries such asgypsum in power plantd e - s u l p h u r i s a t i o n ,powders – titaniumdioxide in pigmentapplication are typicals e rvice examples.
◆ Applications requiring acombination ofc o rrosion and abrasionresistance, such asp h o s p h a t erock/sulphuric acid,together with re l i a b i l i t yand long service life arealso well catered for bythe Saunders KBr a n g e .
Power Stations
Road Tankers
Mining
Water Treatment
China Clay Production
Marine
C o r ro s i v e
◆ C o rrosion is estimatedto cost worldwidei n d u s t ry 300 billionE u ros every year.E v e ry process industrysector handlesc o rrosive fluids to asmaller or gre a t e re x t e n t .
◆ Saunders havee x p e rtise and unrivalledexperience in corro s i v ea p p l i c a t i o n s .
◆ C o n t i n u o u sdevelopment of ‘in-house’ materialstechnology hasresulted in the curre n textensive range ofvalve options includingelastomer andf l u o ropolymer linings,designed to combatc o rro s i o n .
I n d u s t r i a l
◆ Saunders valves arewidely used on utility( a i r, water, and gas)s e rvice lines. Also, asmost process plantshave an eff l u e n tt reatment system therea re many applicationsw h e re Saunders valves can be usedsuccessfully: –
◆ The Food Industry –Saunders valves arewidely used onm a rgarine, yogurt andc o rn processing plants.
◆ In the Tr a n s p o rtIndustries Saundershave found success inthe marine sector asmentioned earlier, inthe automobile sectoron service lines andpaint coating systemsand on road and rail tankers.
A s e p t i c
◆ Saunders is a keyplayer in the evolutionof high purity valvet e c h n o l o g y.
◆ The top tenp h a rm a c e u t i c a lcompanies in the worldhead our international customer base.
◆ Saunders extensiverange of valvesdesigned for thep h a rm a c e u t i c a li n d u s t ry are detailed inother dedicatedl i t e r a t u re available f rom us.
ASEPTIC
Biotechnology
Pharmaceuticals
WFI
Fine Chemicals
Chromatography
Cosmetics
Ultra Filtration
Clean Water
CIP
Yeast
Food & Beverage
Soap
INDUSTRIAL
Marine
Vegetable Oil
Paints
Fire Fighting
Tanning
Oil Production
Automobile
Air
Effluent
Gases, Fuels
Dye Liquors
CORROSIVE
Chlor-Alkali
Iron and Steel
Sulphuric Acid
Effluent treatment
Potable Water
Pulp & Paper
Basic Chemicals
Acids and Alkalis
Organics
Toxic Fluids
Nitric Acid
ABRASIVE
Gold Mining
Cement
Copper Mining
Ceramics
FGD
Sugar
Coal Slurry
Phosphate
Sand
Fertilisers
Titanium dioxide
Sewage
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Actuation Accessories
42 Crane Process Flow Te c h n o l o g i e s
M O D E L SIZE RANGE S T Y L E M A T E R I A L S O L E N O I D SWITCH BOX P O S I T I O N E R AIR FILTER H A N D W H E E L
EC DN8-50 A, AFP PES ✓ ✓ ✓ ✘ ✘
SSC DN8-50 A, AFP 316 C12 ✓ ✓ ✓ ✘ ✓
ECX DN65-150 A, AFP SiAl ✓ ✓ ✘ ✓ ✘
EV DN15-150 A, AFP, KB SiAl ✓ ✓ ✓ ✓ ✘
ES DN15-200 A, AFP, KB SiAl ✓ ✓ ✓ ✓ ✓
✓ = Available and ✘ = Not available
For control applicationon the EC and SSCthe VIAPOS mini off e r sboth pneumatic,e l e c t ro-pneumatic anddigital inputs withsensor feedbackoption and linearmounting designp roviding a neatc o n t rol solution.
This highly modularswitchbox option isavailable for EC/SSC &ECX actuator ranges.The switchbox offers awide range of V3mechanical andp roximity sensors withspace for up to 4 switch, integralsolenoid valve & ASIi n t e rf a c e * .
Suitable for both the EC and SSC. This lowcost switchbox off e r sremote, open andclosed indication of thevalve position. Av a i l a b l ewith two V4 mechanicalor proximity switchesand intrinsically safeo p t i o n s .
A wide range of locally mounted banjo solenoidvalves can be fitted to the Saunders actuatorrange with a manual override option and varioush a z a rdous area classifications. The solenoidrange should cover all yourre q u i re m e n t s .
O v e r v i e w
Solenoid Valves
Mini Positioner
M o d u l e
Mini Switchbox
* ASI interface can be retro-fitted
S a u n d e r s
43
M a n u f a c t u red fro mpolyester coatedaluminium. Thisswitchbox is used forthe ES and EV linearactuators. It has thecapability for up to 4 switches and canincorporate intern a lsolenoid valve and ASI system.
The EC/SSC limit openstop can be supplied too rder and offers a fullyadjustable travel stop.With the removal of theplastic indicator thelimit stop is easilya c c e s s i b l e .
P roviding pre c i s ec o n t rol of the flowt h rough the valve. Thislong life corro s i o nresistant range suits awide variety ofapplications withreliability and accuracy.Available as pneumatice l e c t ro pneumaticintrinsically safe andexplosion pro o f ,together with a varietyof feedback options.
SSC M/O
007 Switchbox
ES Positioner
EC & SSC Limit Open Stop
For extra security theSSC can be suppliedwith an emerg e n c ymanual over- r i d em a n u f a c t u red fro mstainless steel. Pleasecontact Crane forf u rther inform a t i o n .
Shown mounted to ES Actuator
Shown mounted to ES Actuator
44 Crane Process Flow Te c h n o l o g i e s
Software to Aid the Process Engineer inSelecting Saunders Products
Saunders Data Sheets a re available onCD for fast and accurate detailedi n f o rmation on the industrial valve range.
The electronic data manual contains over100 individual technical data sheets toassist you with the selection of the valve.
The Saunders Material SelectionDatabase lists over1,000 process chemicals – just enterthe temperature andconcentration and arecommendation for thebody and diaphragmmaterial is selected.
◆ Material Selection
◆ On/Off Actuation
◆ Technical Data Sheets
DataSheet Index and
typical valveinformation
O n / O ff Actuation Selection
By simply entering your process datainto the selection boxes the pro g r a msizes the actuator to suit your specific re q u i re m e n t s .
Engineering Selection Tools
45
S a u n d e r sQuality Statements and Approvals
Certified Quality from Crane Process Flow Technologies Ltd.
The Complete Approach to Quality
Quality Management system re g i s t e red to ISO 9001 standard in which our R & D andmanufacturing process are optimised to maintain our product quality and serv i c e .
T U V-Merkblatt HPO Qualification for our pro d u c tmanufacturing and cert i f i c a t i o n .
C e rtified compliance to the European Pre s s u reEquipment Directive 97/23/EC authorising Crane P rocess Flow Technologies Ltd to CE mark relevant valve pro d u c t s .
I n t e rnational product approval from authorities such asB u reau Veritas, American Bureau of Shipping.
Polymer/Rubber materials certified as meetingthe re q u i rements of FDA, USP &