SRP981

SRP981 Pneumatic Positioner

Description

The SRP981 Positioner is for operation of pneumatic valve actuators with pneumatic control signals. It is used to reduce the adverse effects of valve friction, for higher thrust and shorter positioning time.

FEATURES

• Independent adjustment of stroke range and zero
• Adjustable amplification and damping
• Split range up to 4-fold possible
• Supply pressure up to 6 bar (90 psig)
• Low vibration effect in all directions
• Mounting according to IEC 534, part 6 (NAMUR)
• Rotation adapter for angles up to 120 °
• Ambient temperature –40 to 80 °C (–40 to 176 °F)
• Travel 8 to 100 mm (0.3 to 4 in)
• Angular range 30 ° to 120 °

• Modular system of additional equipment
  • Electrical limit switches
  • Electrical position transmitter
  • Booster
  • Connection manifold

• Protection class IP54 (IP 65 on request)
• Certificate No. 90/20226(E2) Lloyd’s Register of Shipping for use on vessels

• Explosion Protection
  • pneumatic basic device: ATEX II 2 G c IIC T6 constructive design
  • electrical additional built-in equipment: ATEX II 2 G Ex ib/ia IIB/IIC T4/T6 CU TR explosion protection

SPECIAL VERSION OF SRP981

SRP981 in Stainless Steel housing

Casing	Stainless Steel 1.4404 / 316L,  1.25 mm thick
Ingress Protection	IP65; IP66 under working  conditions (supplied by air supply)
Impact Resistance	> 7 Joule acc. to EN 50014
Seals	VMQ (Silicone)

For dimensional drawings see further down this page

Version for mounting to linear actuators, single acting can be ordered under special version ECEP EP 0301, together with Mounting kit EBZG. Other versions for double acting or mounting to rotary actuators on request.

TECHNICAL DATA

Input

Signal range	0.2 to 1 bar (3 to 15 psig) or split range down to ∆w 0.2 bar (3 psi)
Stroke range	8 to 100 mm (0.3 to 4 in)
Angular range linear	30 ° to 120 °
equal percentage	90 °; from 70 ° linear

Output

Output to actuator

0 to 100% supply air pressure

Supply

Supply air pressure	1.4 to 6 bar (20 to 90 psig)
Air supply    - Solid particle size and density   - Oil rate   - Pressure dew point 10 K under ambient temperature	according to ISO 8573-1   - class 2  - class 3
For air supply, we recommend the FRS02 filter regulator.

Ambient conditions

Ambient temperature	–40 to 80 °C (–40 to 176 °F)
Relative humidity	up to 100%

Operating condiutions

Operating conditions as per IEC 654-1: The device can be operated at a class D2 location

Transport and Storage

Temperature	–50 to 80 °C (–58 to 176 °F)
Protection Class	IP 54 (IP 65 on request)

Response characteristic

Amplification	adjustable
Sensitivity	< 0.1 % F.S.
Non-linearity (terminal based adjustment)	< 0.1 % F.S.
Hysteresis	< 0.3 % F.S.
Supply air dependency	< 0.2 % / 0.1 bar (1.5 psi)
Temperature effect	< 0.3 % / 10 K

Air consumption

supply air pressure	air consumption
Single acting
1.4 bar (20 psig)	200 ln /h ( 7.1 scfh)
3.0 bar (45 psig)	400 ln /h (12.4 scfh)
6.0 bar (90 psig)	600 ln /h (21.2 scfh)
Double acting
1.4 bar (20 psig)	350 ln /h (10.6 scfh)
3.0 bar (45 psig)	550 ln /h (17.7 scfh)
6.0 bar (90 psig)	750 ln /h (33.5 scfh)

Air output

Load effect	–3 % for delivery flow 2 350 ln /h (83 scfh)
	+3 % for exhausted flow 1 900 ln /h (67 scfh)

Capacity at max. deviation

Supply air   Pressure bar   (psig)	1.4 (20)	2 (30)	4 (60)	6 (90)
without booster ln/h (scfh)	2700 (95)	3500 (124)	5500 (194)	7500 (265)
with booster code VKXG -FN ,-GN ln/h (scfh)	18000 (636)	24000 (847)	40000 (1412)	55000 (1942)
with booster code VKXG -HN ln/h (scfh)	36000 (1271)	48000 (1695)	80000 (2825)	110000 (3884)

Data measured according to VDI/VDE 2177

Material

Base Plate	Aluminum (Alloy No. 230) finished with DD-varnish blue
Cover	impact resistant polyester blue
All moving parts of feedback system	1.4305 / 1.4571
Mounting bracket	1.4301

Weight

Single acting
without gauges	approx. 0.7 kg (1.5 lbs)
with gauges	approx. 0.8 kg (1.8 lbs)
Double acting	approx. 0.9 kg (2.0 lbs)
Attachment kit
for diaphragm actuators	approx. 0.3 kg (0.6 lbs)
for rotary actuators	approx. 0.5 kg (1.1 lbs)

Connection

Pneumatic

Female threads G 1/8 acc. to ISO 228

Mounting

Type of mounting	for attaching to diaphragm actuators acc. IEC 534-6 (NAMUR
	for attaching to rotary actuators
Mounting orientation	any

Gauges

Indicating range
Input	0 to 1.6 bar (0 to 23 psig)
Output	0 to 10 bar (0 to 150 psig)
Error limit	class 1.6

 

Accessories

Connection Manifold With Gauges Code J, M

Indicating range	0 to 10 bar (0 to 150 psig)
Error limit	class 1.6
Pneumatic connections	Female threads Q 1/4-18 NPT acc. to DIN 45 141

Connection Manifold with Gauges Code K, L, N

Indicating range
Supply, output	0 to 10 bar (0 to 150 psig)
Input	0 to 1.6 bar (0 to 23 psig)
Error limit	class 1.6
Pneumatic connections	Female threads Q 1/4-18 NPT acc. to DIN 45 141

 

Additional Equipment

(built-in into basic device)

 

Inductive Limit Switch

Code T, U Two-wire System

Input	Stroke / angle from actuator via positioner feedback lever
Output	2 inductive proximity sensors acc. to DIN 19234 or NAMUR for connection to a switching amplifier with an intrinsically safe control circuit
Current consumption	Vane clear > 3 mA   Vane interposed < 1mA

For control circuit with the following electrical values

Supply voltage	DC 8 V, Ri approx. 1 kOhm
Residual ripple	< 5 %
Permissible line resistance	< 100 Ohm

Response characteristic

Gain	Continuously adjustable from 1:1 to approx. 7:1
Switching differential	< 1 %
Switching point repeatability	< 0.2 %

Inductive Limit Switch

Code R Three-wire system

Input	Stroke / angle from actuator via positioner feedback lever
Output	2 inductive proximity sensors, three-wire system, LEDindication, contact, pnp
Supply voltage Us	DC 10 to 30 V
Residual ripple	±10 %, Us = 30 V
Switching frequency	2 kHz
Constant current	100 mA

Response characteristics

Gain	Continuously adjustable from 1:1 to approx. 7:1
Switching differential	< 1 %
Switching point repeatability	< 0.2 %

Parts set for later installation

Code R

EW 419 510 291

Limit Switch Assembly with Micro switches

Code V

Input	Stroke / angle from actuator via positioner feedback lever
Output	2 micro-switches

Connected load

Alternating current
Switching capacity	max. 250 VA
Switching voltage	max. 50 V
Switching current with ohmic resistance	max. 5 A
inductive resistance	max. 2 A
Bulb, metal filament	max. 0.5 A

Direct Current

Switching voltage, max	Ohamic load	Inductive load
30 V  50 V	5 A  1 A	3 A  1 A

Response Characteristic

Gain	Continuously adjustable from 1:1 to approx. 7:1
Switching differential	< 2.5 %
Switching point repearability	< 0.2%

Parts set for later installation

Code V

EW 420 421 017

Electrical Position Transmitter

Code W

Input	Stroke / angle from actuator via positioner feedback lever
Sensor	resistive precision conductive plastic element
Stroke range	15 to 80 mm (0.6 to3.15 in) < 15 mm (0.6 in) on request
Angular range	60 to 120 °
Output	Two-wire system
Signal range	4-20 mA
Permitted load	RB max = (US–12 V)/0.02 A (US = supply voltage)

Power supply

Supply voltage	DC 12 to 36 V
Permitted ripple	< 10 % p.p.
Supply voltage dependency	< 0.2 %

Response characteristic

Non-linearity with terminal based setting	< 1.0 % F.S.
Hysteresis	< 0.5 % F.S.
External resistance dependency	< 0.2 % / ∆ RB max
Temperature effect	< 0.3 % / 10 K

Explosion protection

Type of protection	II 2 G Ex ib/ia IIB/IIC T4/T6
Certificate of conformity	PTB 02 ATEX 2153

For operation in certified intrinsically safe circuits with the following maximum values:

Umax	T4: 30 V	T6: 22 V
Imax	T4: 130 mA	T6: 66 mA
Pmax	T4: 0,9 W	T6: 0.5 W
Internal inductance	9 µH
Internal capacitance	to earth 10 nF or 6 nF differentia

Ambient temperature

Temperature class	T6	–40 to 40 °C (–40 to 104 °F)
	T5	–40 to 55 °C (–40 to 131 °F)
	T4	–40 to 80 °C (–40 to 176 °F)

Parts set for later installation

Code W

EW 420 661 115

Common Data

Ambient conditions

Ambient Temperature	–25 to 80 °C (–13 to 176 °F)  –40 to 80 °C (–40 to 176 °F)
Relative Humidity	up to %100
Operating conditions as per IEC 654-1	The device can be operated at a class D2 location

Transport and storage

Temperature	–40 to 80 °C (–40 to 176 °F)
Protection class	IP 54 (IP 65 on request)

Electrical connection

Line entry	1 or 2 cable glands M20x1.5 (others with Adapter AD-...)
Cable Diameter	6 to 12 mm (0.24 to 0.47 in)
Screw terminals	Screw terminals for wires up to 2.5 mm2 (AWG 14)

Materials

Base plate	Galvanized steel
Control vane	Aluminium
Setting mechanism	Fiber glass-reinforced polyamide

Electromagnetic compatibility EMC

Operating conditions

industrial environment

Immunity according to 

NAMUR recommendation NE21	fulfilled
EN 61 326	fulfilled
EN 61 000-6-2	fulfilled

Emission according to

EN 55 011, Group 1, Class A	fulfilled
EN 61 000-6-2	fulfilled

CE marking

Electromagnetic compatibility	2004/108/EG
Low voltage regulations	w/o Ex: 73/23/EWG fulfilled (with Ex: not applicable)

Safety

as per DIN EN 61010-1 (DIN IEC 61010-1) (VDE 0411 part 1)	safety class III
overvoltage category	1
internal fuses	none
external fuses	Limitation of power supplies for fire protection has to be observed due to EN 61010-1 9.3. ff.

MODEL CODES SRP981

MODEL CODES Accessories

ATTACHMENT KIT FOR DIAPHRAGM ACTUATORS

ATTACHMENT KIT FOR ROTARY ACTUATORS

DIMENSIONS Additional equipment

DIMENSIONS Additional equipment

DIMENSIONS SRP981 Special version in Stainless Steel housing

DIMENSIONS, CONNECTIONS

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