Pilot-Type Regulator Valves

Pilot-Type Regulator Valves

Common specifications & Outer dimensions

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

How to use the 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 example on the left, 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 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.

∗	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.

Common outer dimensions for Pilot-Type Regulator Valves

Unit: mm

Model No.- Bore	Outer dimensions				Mounting dimensions			Orifice (Note)		Weight of main body (kg)
Model No.- Bore	L	A	B	H	V	W	n-Z	M	N	Weight of main body (kg)
`UFS@-080`	`280`	`95`	`235`	`330`	`-`	`-`	`-`	`436`	`479`	`80`
`100`	`350`	`127`	`230`	`380`	`-`	`-`	`-`	`496`	`545`	`90`
`125`	`420`	`145`	`260`	`440`	`-`	`-`	`-`	`591`	`644`	`130`
`150`	`450`	`153`	`230`	`470`	`-`	`-`	`-`	`666`	`719`	`170`
`200`	`600`	`220`	`285`	`545`	`-`	`320`	`2-23`	`826`	`883`	`270`
`250`	`700`	`250`	`440`	`585`	`-`	`500`	`2-23`	`986`	`1051`	`400`
`300`	`800`	`295`	`440`	`600`	`-`	`440`	`2-23`	`1146`	`1221`	`510`
`350`	`900`	`305`	`370`	`700`	`-`	`480`	`2-23`	`1306`	`1381`	`590`
`400`	`1000`	`320`	`385`	`800`	`-`	`660`	`2-25`	`1476`	`1575`	`800`
`450`	`1100`	`450`	`540`	`970`	`-`	`600`	`2-27`	`1626`	`1737`	`1200`
`500`	`1200`	`450`	`540`	`970`	`-`	`600`	`2-27`	`1786`	`1910`	`1300`
`600`	`1400`	`500`	`580`	`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

400

240

1720

280

500

700

500

2580

1700

300

1700

100

275

360

250

400

300

1910

350

500

700

500

2820

1700

350

1700

125

280

370

260

450

375

2135

420

500

700

500

3065

1700

350

1700

150

290

380

280

450

2290

450

500

700

600

3250

1800

355

1800

200

300

400

300

600

2800

600

500

700

600

3800

1800

420

1900

250

300

460

380

750

3420

700

500

700

4480

1900

450

1900

300

480

400

900

3880

800

500

700

4960

1900

500

2000

350

300

720

430

1050

4580

900

600

800

5900

2200

550

2200

400

300

820

470

1200

5160

1000

600

850

800

6580

2250

580

2400

450

300

880

500

1350

5680

1100

600

900

7160

2400

750

2800

500

300

960

530

1500

6220

1200

600

1000

900

7780

2500

750

2900

600

300

1100

560

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 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.