Pilot-Type Regulator Valves


Pilot-Type Regulator Valves


Common specifications & Outer dimensions
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Common specifications for Pilot-Type Regulator Valves

Flange standard:

JIS 10K, JIS B2062 Waterworks standard

Material:

FC, FCD, SCS/SCS
Besides the above, a wide variety of materials are available, such as YOKOTA's duplex type stainless steel YST130N with high corrosion resistance.

Applicable liquid:

Various liquids at temperatures of 0-70 degree C (Please inquire for special liquids.)

Cavitation characteristics:

The allowable cavitation coefficients (cc) are:
With a bore less than 100mm: cc = 0.45
With a bore more than 150mm: cc = 0.24
For details, please refer to this page.



Common selection chart for Pilot-Type Regulator Valves


Common selection chart for Pilot-Type Regulator Valves


How to use the above selection chart

Plot point C with x-axis value A and y-axis value B, where A is a planned differential pressure between the front and the rear of the valve, and B is a planned flow rate.
Then select a valve with a bore size line immediately above point C.
In the above example, the following valves are selected.

Standard type (shown by black lines):

350mm bore

Constant flow regulation type (shown by blue lines):

400mm bore


Note:

The above selection chart is based on the maximum flow speed of 3m/sec. If a planned maximum flow speed exceeds this level, please contact us.

The minimum flow rate while in continuous use should be more than 10% of the maximum flow rate.



Common outer dimensions for Pilot-Type Regulator Valves

Pilot-Type Regulator Valves

*

Inspection window is furnished on valves with a bore of 150mm or more.

*

shows an orifice added for over-discharge cutoff function.

shows a horizontal shaft type butterfly valve (optional) installed in place of the orifice.

*

The size of short pipes that are attached to the front and the rear of the orifice or the butterfly valve should be same as a valve bore.


Unit: mm

Model No.- Bore
Outer dimensions
Mounting dimensions
Orifice
(Note)
Weight of
main body
L
A
B
H
V
W
n-Z
M
N
(kg)

UFS@- 80

280

95

160

330

-

-

-

436

479

80

100

350

127

195

380

-

-

-

496

545

90

125

420

145

240

440

-

-

-

591

644

130

150

450

153

245

470

-

-

-

666

719

170

200

600

220

290

545

-

320

2-23

826

883

270

250

700

250

375

585

-

500

2-23

986

1051

400

300

800

295

395

600

-

440

2-23

1146

1221

510

350

900

305

415

700

-

480

2-23

1306

1381

590

400

1000

320

470

800

-

660

2-25

1476

1575

800

450

1100

450

565

970

-

600

2-27

1626

1737

1200

500

1200

450

565

970

-

600

2-27

1786

1910

1300

600

1400

500

600

1000

-

700

2-27

2126

2277

2200

Note:
An orifice or a butterfly valve is installed when flow rate control function is required.
The above "M" indicates the dimension of the orifice, and "N" indicates the dimension of the butterfly valve unit (optional) installed in place of the orifice.
If a butterfly valve is installed, short pipes are attached to the front and the rear of the butterfly valve as shown in the above drawing.


Installation example for the Constant Pressure Valve (reference)

Pilot-Type Regulator Valves / Installation example in case of the Constant Pressure Valve


Part name
1

Constant Pressure Valve

2

Sluice valve

3

Flexible joint

4

Short pipe

5

Air valve and safety valve

6

Safety valve (with bore of 1/2 the main valve bore or more)

7

Drain pipe

8

By-pass piping unit


Unit: mm

Model No. - Bore
Installation and piping dimensions
A
B
C
D
E
F
L
P
R
S
M
N
G
H

UFSP- 80

270

320

240

240

240

1560

280

500

700

500

2420

1700

300

1700

100

275

360

250

300

300

1810

350

500

700

500

2720

1700

350

1700

125

280

370

260

375

375

2060

420

500

700

500

2990

1700

350

1700

150

290

380

280

450

450

2290

450

500

700

600

3250

1800

355

1800

200

300

400

300

600

600

2800

600

500

700

600

3800

1800

420

1900

250

300

460

380

750

750

3420

700

500

700

700

4480

1900

450

1900

300

300

480

400

900

900

3880

800

500

700

700

4960

1900

500

2000

350

300

720

430

1050

1050

4580

900

600

800

800

5900

2200

550

2200

400

300

820

470

1200

1200

5160

1000

600

850

800

6580

2250

580

2400

450

300

880

500

1350

1350

5680

1100

600

900

900

7160

2400

750

2800

500

300

960

530

1500

1500

6220

1200

600

1000

900

7780

2500

750

2900

600

300

1100

560

1800

1800

7220

1400

600

1100

1000

8920

2700

800

2900

Note:

To simplify installation, a unit with the valve preinstalled in a box culvert can be provided. Please inquire.



Notes on piping and handling

Installation in horizontal piping is standard. Please contact us about installation in vertical piping.

It is not particularly necessary to install a straight pipe at the front or the rear of the valve, however sharp deflection of flow directly before the main valve should be avoided as much as possible.

Sluice valves for maintenance and inspection should be provided at the inlet and the outlet sides of the valve.

A strainer should be installed at the intake of the pipeline or the inlet side of the valve.

For a pump feeding system, a high speed air valve should be installed in any line where air may enter during stoppage of the pump.

For the Constant Pressure Valve, safety valves (with a bore of 1/2 the main valve bore or more) should be installed at the inlet and the outlet sides, and drain pipes should be installed from the safety valves to the discharge outlet. Our reliable YOKOTA Safety Valves are most suitable for this purpose.

For installing a float valve on the upstream or the downstream side of the Constant Pressure Valve, or installing two or more Constant Pressure Valves in series, please contact us.

For the Liquid Level Regulator Valve, there may be a time lag between closure of the ball tap and subsequent closure of the main valve, which should be considered in deciding the set water level. If you need more help, please contact us.



Specifications stated here may be subject to change without notice due to product improvement.

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Technical data
Selection & Dimensions
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