Kobold PSR Manual de usuario

KOBOLD PSR/PS FLOW SWITCH

User Instructions

Manual-PSR-PS_3-13

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Table Of Contents

PSR/PS

KOBOLD PSR/PS FLOW SWITCH

1.0 General .......................................................................... 1

2.0 Specifications ................................................................ 2

3.0 Installation ..................................................................... 5

3.1 Contact Protection ......................................................... 5

4.0 Operation ....................................................................... 6

4.1 Adjusting Setpoint .......................................................... 6

5.0 Maintenance .................................................................. 7

6.0 Damaged Equipment ..................................................... 7

7.0 Need Help with your PSR/PS ........................................ 7

LIST of DIAGRAMS

Diagram 2.4 Diagram of Dimensions ................................................ 4

Diagram 2.5 Diagram of Pressure loss vs. Flow rate ........................ 4

Diagram 4.2 Diagram of Reed Contact ............................................. 6

LIST of TABLES

Table 2.1 Table of Technical Data ............................................... 1

Table 2.2 Table of Construction ................................................... 2

Table 2.3a & b Table of Switching Ranges ........................................... 3

Table 3.2 Table Reed Contact - Data ........................................... 5

Rev. 3/13

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1PSR/PS

KOBOLD PSR/PS FLOW SWITCH

User Instructions

CAUTION: For safety reasons, please read the cautionary information located at

the end of the manual, before attempting installation.

1.0 General

The KOBOLD PSR/PS flow switch is intended for applications in which an electrical

switching function is required once a specific flow is achieved.

The PSR/PS can be set to operate as either a normally-open (N/O) or normally-closed

(N/C) switch. Switching is done with a reed contact which is electrically isolated from the

flowing medium.

The device operates through use of a paddle-spring arrangement. The flowing medium

exerts force on the lower part of the paddle ( in the T-piece ). The paddle pivots about a

point higher in the PSR/PS body but is resisted by a leaf spring. On the upper part of the

paddle is a magnet, which moves as the paddle pivots about its center. A reed switch is

located outside the PSR/PS housing ( thus hermetically isolated ) inside a movable

plastic housing. As the magnet nears the reed switch, the switch closes. By moving the

switch, with adjustable switch point.

2.0 Specifications

Table 2.1: Technical Data

Operating Principle: Spring resisted paddle

Dimensions: See Diagram 2.4

Ranges: See Diagram 2.3a & 2.3b

Maximum Pressure: Most Brass/SS units:1450 PSIG (100 Bar)

NOTE:

PSR-5132 & PSR-5140: 360 PSIG (25 Bar)

Maximum Medium Temperature: 230 Degrees F (110 Degrees C)

Maximum Ambient Temperature: 150 Degrees F ( 65 Degrees C)

Reed Switch Specifications: See Table 3.2

Rev. 3/13

reed switch, the flow required to close it is altered. The result is a flow-sensitive reed

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PSR/PS 2

Table 2.2: Construction

Housing

(1,4,6)

Brass SS

Impact Plate

(3.1)

304 SS 304 SS

Leaf Spring

(3.4)

301 SS 301 SS

Lever (3.2) 301 SS 301 SS

Locking Plate

(5)

Brass Brass

Housing (7) Polyamide

GFR*

Polyamide

GFR*

Cabling (8) PVC PVC

Magnet (3.3) Ceramic Ceramic

*GFR - Glass Fiber Reinforced

Rev. 3/13

O-Ring (2) Buna-N FKM

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3PSR/PS

Stand

Conn.

NPT

Stand. switching ranges

Increasing Decreasing

GPM Water GPM Water

Flow switch model PSR

Brass SS

1/4” 0.9-1.3 0.6-1.2 PSR 5105 PSR 5205

3/8” 1.0-1.6 0.7-1.5 PSR 5110 PSR 5210

1/2” 1.3-2.1 1.0-2.0 PSR 5115 PSR 5215

3/4” 3.0-4.0 2.2-3.0 PSR 5120 PSR 5220

1” 3.2-5.0 2.4-4.5 PSR 5125 PSR 5225

1 1/4” 4.9-8.5 3.8-7.8 PSR 5132 PSR 5232

1 1/2” 9.2-15.0 7.9-14.3 PSR 5140 PSR 5240

Pipe

Size

Stand. switching ranges

Increasing Decreasing

GPM Water GPM Water

Stand.

conn.

NPT

Flow switch Model PS

Material

Brass SS

2” 18-24 16-22 1/2”

PS-5149 PS-5249

3” 48-66 45-62 1/2”

4” 84-106 79-101 1/2”

6” 185-242 176-237 1/2”

2” 13-16 11-15 1/2”

PS-5152 PS-5252

3” 41-48 38-44 1/2”

4” 57-70 53-66 1/2”

6” 147-159 137-156 1/2”

4” 24-30 19-27 1/2”

PS-5114 PS-5214

6” 53-75 44-62 1/2”

8” 101-141 88-123 1/2”

Table 2.3a: Switching Ranges - PSR

Table 2.3b: Switching Ranges - PS

Rev. 3/13

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PSR/PS 4

Diagram 2.4 Dimensions - PSR/PS





Order Number

Thread

(NPT)

PS-5149/PS-5249 3.66 2.32 1.34 0.78 0.87 - 1/2"

PS-5152/PS-5252 5.25 2.22 3.03 0.75 1.06 1.18 1/2"

PS-5114/PS-5214 7.55 4.52 3.03 0.75 1.06 1.18 1/2"

PSR-5105/PSR-5205 1.97 0.39 3.15 - 1.06 1.18 1/4"

PSR-5110/PSR-5210 1.97 0.39 3.15 - 1.06 1.18 3/8"

PSR-5115/PSR-5215 1.97 0.39 3.15 - 1.06 1.18 1/2"

PSR-5120/PSR-5220 2.05 0.59 3.21 - 1.25 1.18 3/4"

PSR-5125/PSR-5225 2.2 0.59 3.31 - 1.54 1.18 1"

PSR-5132/PSR-5232 2.6 - 3.5 - 1.97 1.18 1 1/4"

PSR-5140/PSR-5240 2.6 - 3.62 - 2.36 1.18 1 1/2"

Dimensions (inches)

HEX2HEX1DCBA



Pressure Drop:

The pressure drop of the flow switch is mostly due to

the size of the paddle and resulting resistance to flow.

The data given in the diagram is valid for units with the

standard set point ranges. The pressure drop is less for

units with the special set point ranges in the table. The

set point ranges are those over which the contact can

be adjusted. The high grade stainless spring steel

beam enables actual flow rates to be significantly

higher without causing damage. There would however

be a higher pressure drop.

Diagram 2.5: Pressure Loss vs. Flow Rate

Rev. 3/13

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5PSR/PS

3.0 Installation Instructions

CAUTION: For Safety reasons, please read the cautionary information located at

the end of the manual, before attempting installation.

Note that the PSR must be installed so that flow direction in the pipe is as indicated by

the arrow on the T-piece. The flow direction arrow on the PS series is stamped on the

clamp plate.

that loads on the switch do not exceed the maximum ratings as given in Table 3.2.

Remember that capacitive and inductive loads (such as motors) exhibit much greater

voltage/current requirements at start-up and shut-down than the typical operating values.

3.1 Contact Protection

When driving inductive or capacitive loads, we recommend the use of an isolation

relay. KOBOLD supplies a line of relays for such instances.

Table 3.2: Reed Contact - Electrical Data

Maximum Current: 1.5A

Environmental Protection: NEMA 4 / IP 65

Rev. 3/13

The PSR/PS is installed directly in the pipeline. The PSR/PS is supplied with NPT or BSP

The reed contact is simply an open/closed type of switch - connect appropriately. Ensure

Maximum values of current and voltage must not be exceeded on the reed switch.

Maximum Voltage (SPST): 250 VAC

Maximum Voltage (SPDT): 150 VAC

Maximum Power Dissipation (SPDT):20 VA / 20 W / 0.5 A

Electrical Cable Length: 5 ft. (Std.)

Maximum Power Dissipation (SPST):50 VA / 50 W / 1.5 A

threads. Use of PTFE tape is recommended to aid installation.

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PSR/PS 6

4.0 Operation

As described in Section 1.0, the PSR/PS uses a paddle to activate a reed contact

wired as such.

4.1 Adjusting the Setpoint

Diagram 4.2: Adjusting the Setpoint

Construction, and do as follows:

(N/C) switching function. The switch functions as an N/O switch when the switch

housing (4). The switch functions as an N/C switch when the switch assembly (7)

Rev. 3/13

located at the top of the instrument. The reed contact is simply a N/O or N/C switch, and should be

approximately the middle of its range. To change the setpoint, consult Table 2.2:

Decide whether you want to retain the normally open (N/O) or change to the normally closed

assembly (7) is positioned such that the tip of the red arrow is just emerging from flow switch

is positioned such that the tip of the white arrow is just emerging from flow switch housing (4).

The switch becomes less sensitive to flow (i.e activates at a higher flowrate) as more of

N/C. The N/C switching sensitivity can then be adjusted in similar fashion as noted above.

The PSR/PS is pre-adjusted at the factory as a normally open (N/O) switch, set to switch in

Slightly loosen the clamp plate screws (5) to allow movement of the reed contact (7).

the arrow point is displayed (pulled out)of the housing. When the red arrow is almost completely

pulled out from the flow switch housing, the switch function will transition from N/O to

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7PSR/PS

5.0 Maintenance

Due to the simple construction of the PSR/PS, it is nearly maintenance free. Should

cleaning ever be required, simply release pressure in your system, loosen the lock nut

(Diagram 2.2, Item 6) on the PSR/PS and pull the body straight up. Clean as necessary

and replace. During replacement, note that the pivot plate of the balance arm (Item 3.2)

is keyed to the T-piece (Item 1). The instrument must be reassembled with the keys

properly aligned in order to function properly.

6.0 Arrival of Damaged Equipment

Your instrument was inspected prior to shipment and found to be defect-free. If damage

is visible on the unit, we advise that you carefully inspect the packing in which it was

delivered. If damage is visible, notify your local carrier at once, since the carrier is liable

for a replacement under these circumstances. If your claim is refused, please contact

KOBOLD Instruments for further advisement.

7.0 Need help with your PSR/PS

Call one of our friendly engineers at 412-788-2830.

Note: If during adjustment, the switch assembly (7) is pulled too far out of

the flow switch housing (4), the switch will not function when the impact

plate (3.1) is deflected. If this occurs, simply slide the switch assembly

back into the housing until the contact functions as desired.

Rev. 3/13

If switch is removed, note that the arrow points face opposite tothe normalflow direction.

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