Flowserve TB-MAG INNOMAG User Manual download pdf (Page 15)

INNOMAG® TB-MAG™ ASME and ISO SEALLESS ENGLISH 26999988 06-14

Page 15 of 44

The maximum discharge pressure must be

less than or equal to the P-T rating. Discharge

pressure may be approximated by adding the

suction pressure to the differential pressure

developed by the pump.

Figure 3-1

Temperature - °C (°F)

-29

(-20)

-18

(0)

(100)

(200)

121

(250)

Pressure - barg (psig)

ASME

B16.42

Class

150

17.2

(250)

17.2

(250)

17.2

(250)

16.2

(235)

15.5

(225)

ASME

B16.42

Class

300

20.7

(300)

20.7

(300)

20.7

(300)

20.7

(300)

20.7

(300)

1092-2

(ISO)

PN 16

(232)

JIS

B2239

10K

(203)

3.5.3 Energy Efficiency Operation of Pumps

The pump supplied will have been selected from

Flowserve’s extensive product line to have

optimum efficiency for the application. If supplied

with an electric motor then the motor will meet or

exceed current legislation for motor efficiency.

However it is the way the pump is operated which

has the greatest impact on the amount and cost of

energy used during the operating life of the pump.

The following are key points in achieving minimum

operating cost for the equipment:

a) Design the pipe system for minimum friction

losses

b) Ensure that the control system switches off the

pump when not required

c) In a multi-pump system run the minimum

number of pumps

d) Try to avoid systems which by-pass excess

flow

e) Avoid as far as possible controlling pump flow

by throttle valves

f) When commissioned, check that the pump

operates at the duty specified to Flowserve

g) If it has been found that the pump head and

flow exceed that required, trim the pump

impeller diameter

h) Ensure that the pump is operating with

sufficient NPSH available.

i) Use variable speed drives for systems which

require variable flow. A VFD for an induction

motor is a particularly effective way of

achieving speed variation and energy/cost

reduction

j) Notes for VFD usage

a) make sure that the motor is compatible

with VFD

b) Do not over-speed the pump without

checking the power capability with

Flowserve

c) On systems with high static head,

speed reduction is limited. Avoid

running the pump at a speed which

gives low or zero flow

d) Do not run at a low speed and flow rate

which lets solid settle out of

suspension in the pipe work

e) Do not use a VFD for a fixed flow

requirement; it will introduce power

losses

k) Select high efficiency motors

l) If replacing a standard motor with a high

efficiency motor it will run faster and the pump

could take more power. Reduce the impeller

diameter to achieve energy reduction

m) If the pump system pipe work or equipment is

changed or process duty is changed, check

that the pump is still correctly sized

n) Periodically check that the pipe system has

not become corroded or blocked

o) Periodically check that the pump is operating

at the flow, head and power expected and that

the efficiency has not reduced with erosion or

corrosion damage.

4 INSTALLATION

Equipment operated in hazardous locations

must comply with the relevant explosion protection

regulations. See section 1.6.4, Products used in

potentially explosive atmospheres.

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 43 44

Comments to this Manuals

No comments

Flowserve TB-MAG INNOMAG User Manual Page 15

Comments to this Manuals

Related products and manuals for Pumps Flowserve TB-MAG INNOMAG