Proportional Relief ValvesRV, RL, RM Series

FI09040813

www.fitokgroup.com

FITOK Group

Proportional Relief Valves RV, RL and RM Series

Valves open when system pressure reaches the set pressure. Then the medium flows out to release system pressure. Valves close

when the system pressure is down to the Resealing Pressure.

The opening height and the system pressure are direct proportional. However, there's no limit for relieving capacity. So valves in

these series should be selected carefully according to system requirements.

Introduction

Features

Set Pressure:

RV Series: 7 color-coded springs available for a wide range of set pressure,

50 to 6000 psig @ 70°F (3.4 to 414 bar @ 20°C)

RL Series: 10 to 225 psig @ 70°F (0.68 to 15.5 bar @ 20°C)

RM Series: 3 color-coded springs available for a wide range of set pressure,

50 to 1500 psig @ 70°F (3.4 to 103 bar @ 20°C)

Maximum Outlet Pressure:

RV Series: 1500 psig (103 bar)

RL Series: 225 psig (15.5 bar)

RM Series: 1500 psig (103 bar)

:

RV Series: 0.14 (3.6 mm)

RL Series: 0.19 (4.8 mm) and 0.25 (6.4 mm)

RM Series: 0.25 (6.4 mm)

Back Pressure and Pre-set Pressure

RV and RM Series: Balance stem design to eliminate the effect of system back pressure

RL Series: Pre-set pressure = Desired pressure - 0.8 × Back pressure

Working Temerature: -10°F to 300°F (-23°C to 148°C)

Variety of end connections

Liquid or gas service

Adjustable bonnet cap and adjustable set pressure

Lock wired secure cap to maintain set pressure

Variety of seal materials

Label identifies the set pressure range

Manual override handle available to open the valve without changing

the set pressure which pressure lower than 1500 psig

◎

◎

◎

◎

◎

◎

◎

◎

◎

◎

◎

◎

Orifice Size

"

" "

"

Proportional Relief Valves 2

Temperature Range of Sealing Materials

RL Series

0 150 300 450 600 750 900 1050 1200 1350 1500

0 10.3 20.7 31.0 41.4 51.7 62.1 72.4 82.7 93.1 103.4

0

10.3

20.7

31.0

41.4

51.7

62.1

72.4

93.1

103.4

82.7

0

150

300

450

600

750

900

1050

1200

1350

1500

0 25 50 75 100 125 150 175 200 225

0 1.7 3.4 5.2 6.9 8.6 10.3 12.1 13.8 15.5

0

1.7

3.4

5.2

6.9

8.6

10.3

12.1

13.8

15.5

0

25

50

75

100

125

150

175

200

225

Resea ing Pressure (psig)l

Cra

ckin

g P

ress

ure

(p

sig

)

Resea ing Pressure (bar)l

Cra

ckin

g P

ress

ure

(b

ar)

276

414

0 1000 2000 3000 4000 5000 60000

34

69

103

138

172

207

241

310

345

379

0 34 69 103 138 172 207 241 276 310 345 379 414

0

500

1000

1500

2000

2500

3000

3500

4000

4500

5000

5500

6000

RM SeriesRV Series

Cracking Pressure and Resealing Pressure

Cracking pressure: The pressure at which the first indication of flow occurs. The repeatability of the cracking pressure of each valve after initial relief is within ±5% at room temperature.Resealing pressure: The pressure at which there is no indication of flow. Resealing pressure is always lower than the set pressure.Back pressure: The pressure of the outlet of the valve. It increases the set pressure.

Resea ing Pressure (psig)l

Cra

ckin

g P

ress

ure

(p

sig

)

Resea ing Pressure (bar)l

Cra

ckin

g P

ress

ure

(b

ar)

Resea ing Pressure (psig)l

Cra

ckin

g P

ress

ure

(p

sig

)

Resea ing Pressure (bar)l

Cra

ckin

g P

ress

ure

(b

ar)

30 to 250 (-1 to 121)

0 to 250 (-17 to 121)

Ethylene Propylene Rubber

Buna-N Rubber

Fluorocarbon Rubber

O-ring Material Temperature Ranges o oF ( C)

-10 to 300 (-23 to 148)Neoprene Rubber

25 to 250 (-4 to 121)

1 Proportional Relief Valves

RV Series

Flow Data at 70°F (20°C)

RM Series

Inle

t Pre

ssu

re (

psi

g)

Water Flow (U.S. gal/min)

Water Flow (L/min)

200

300

400

500

600

700

800

900

1000

1100

1200

0.2 0.40 0.8 1.0 1.2 1.60.6 1.4 2.01.8

1.510 3.03 4.54 6.06 7.57

Inle

t Pre

ssu

re (

bar)

13.8

20.7

27.6

34.5

41.4

48.3

55.2

62.1

68.9

75.8

82.7

RL Series

0

50

100

150

Inle

t Pre

ssu

re (

psi

g)

0.2 1.8 2.01.0 1.2 1.61.40.6 0.80.40

Water Flow (U.S. gal/min)

200

250

300

3.4

6.9

10.3

13.8

17.2

20.7

0

Inle

t Pre

ssu

re (

bar)

Water Flow (L/min)

1.510 3.03 4.54 6.06 7.57

Inle

t Pre

ssu

re (

psi

g)

Inle

t Pre

ssu

re (

bar)

1000

1500

2000

2500

3000

3500

4000

4500

5000

5500

6000

6500

10 200 40 50 60 8030 70 10090

500

200

68.9

103

138

172

207

241

276

310

345

379

414

449

34.5

13.8

28321699 226511335660

Air Flow (std L/min)

Inle

t Pre

ssu

re (

psi

g)

Water Flow (U.S. gal/min)

Inle

t Pre

ssu

re (

bar)

1000

1500

2000

2500

3000

3500

4000

4500

5000

5500

6000

6500

0.2 0.40 0.8 1.0 1.2 1.60.6 1.4 2.01.8

500

200

68.9

103

138

172

207

241

276

310

345

379

414

449

34.5

13.8

0.76 1.510 3.03 3.79 4.54 6.062.27 5.30 7.576.81

Water Flow (L/min)

Air Flow (std ft3 /min)

-8 (Orifice Size: 0.25")-7 (Orifice Size: 0.19")

Inle

t Pre

ssu

re (

psi

g)

Inle

t Pre

ssu

re (

bar)

0

50

100

150

2 18 2010 12 16146 840

200

250

300

3.4

6.9

10.3

13.8

17.2

20.7

0

56.6 510 566283 340 453396170 2271130

Air Flow (std L/min)

3 Air Flow (std ft /min)

Inle

t Pre

ssu

re (

psi

g)

Inle

t Pre

ssu

re (

bar)

Air Flow (std L/min)

200

300

400

500

600

700

800

900

1000

1100

1200

13.8

20.7

27.6

34.5

41.4

48.3

55.2

62.1

68.9

75.8

82.728321699 226511335660

10 200 40 50 60 8030 70 10090

Air Flow (std ft3 /min)

3 Proportional Relief Valves

Standard Materials of Construction

1. Lubricant: Silicone-based

2. Contact the authorized representative or FITOK Group for other materials.

RV Series

1. Lubricant: Silicone-based

2. Contact the authorized representative or FITOK Group for other materials.

1

2

3

4

5

8

10

11

14

13

7

6

9

12

15

316 SS/A479

Polyester

S17700 SS/AMS 5678

17-4PH powdered metal

316 SS/A276

PTFE

316 SS/A479

Fluorocarbon FKM

316 SS/A479

316 SS/A479

316 SS/A182

Fluorocarbon FKM

Fluorocarbon FKM

316 SS/A479

Material Grade/ASTM SpecificationComponent

316 SS/A276

4

14

13

12

11

2

5

3

1

6

7

8

9

10

15

Bonnet Cap

Spring

Label

Lock Nut

O-ring

Seat Retainer

Insert

Body

Stem

Bonnet

Seal Retainer

Spring Support

O-ring

O-ring

Plug

Polyester

304SS/A240

17-4PH powdered metal

316 SS/A479

316 SS/A479

316 SS/A479+Fluorocarbon FKM

316 SS/A479

316 SS/A182

Fluorocarbon FKM

316 SS/A276

316 SS/A479

316 SS/A479

S17700 SS/AMS 5678

316 SS/A276

316 SS/A479

Fluorocarbon FKM

4

2

5

3

1

6

7

9

8

14

13

12

11

10

16

15

RL Series

ComponentMaterial Grade/ASTM

Specification

6a 316 SS/A479

Orifice 8 in. (mm)

0.25 (6.4)

Orifice 7 in. (mm)

0.19 (4.8)

1

2

3

4

5

6

7

8

9

10

12

11

15

13

16

14

1

4

5

6a

7

8

9

10

12

11

15

13

16

14

Spring Support

Label

Lock Nut

Sleeve

Bonnet

Quad Seal

O-ring

Bonnet Cap

Plug

Spring

Seat (Only 7 Orifice)

Bonded disc

Gasket (Only 7 Orifice)

Retainer (Only 7 Orifice)

Stem

Body

Ring (Only 8 Orifice)

Proportional Relief Valves 4

RV Series

Dimensions

RM Series

1. Lubricant: Silicone-based

2. Contact the authorized representative or FITOK Group for other materials.

316 SS/A276

316 SS/A479

Polyester

S17700 SS/AMS 5678

316 SS/A479+Fluorocarbon FKM

316 SS/A182

4

12

11

2

5

3

Component

1

Material Grade/ASTM Specification

6

7

8

9

10

316 SS/A479

316 SS/A276

17-4PH powdered metal

Plug

Bonnet Cap

Retainer

Seal

Stem

Body

O-ring

Lock Nut

Spring

Label

Bonnet

Spring Support

316 SS/A479

Fluorocarbon FKM

Fluorocarbon FKM

0.14(3.6)

0.50(12.7)

4.09(103.9)

5.81(147.6)

5.37(136.4)

1.72(43.7)

1.72(43.7)

4.09(103.9)

4.28(108.7)

4.28(108.7)

5.37(136.4)

4.09(104.9)

4.08(103.5)

3.89(98.8)

4.14(105.2)

2.70(68.6)

2.70(68.6)

2.70(68.6)

4.09(103.9)

2.70(68.6)

1.17(29.7)

1.83

1.60(40.6)

1.83(46.5)

1.44(36.6)

1.38(34.9)

1.44(36.6)

1.19(30.2)

1.38(34.9)

1.17(29.7)

0.43(10.9)

0.43(10.9)

0.43(10.9)

0.50(12.7)

0.43(10.9)

4.09(103.9)

5.92(150.4)

4.14(105.2)

4.08(103.5)

2.70(68.6)

1.60(40.6)

0.43(10.9)

RV□□-ML12-6

RV□□-FRT4-6

RV□□-FNS4-6

RV□□-NS4-6

RV□□-ML8-6

RV□□-ML6-6

RV□□-FL8-6

RV□□-FL6-6

RV□□-FL4-6

C DmaxBA

Orificein. (mm)

Inlet Outlet

BasicOrderingNumber

1.17(29.7)

(46.5)

Connection Type and Size

Emax

Fmax

Dimension in. (mm)

1

2

3

5

6

4

7

8

9

11

12

10

Lock Wire Hole

Lock Wire Hole

F m

ax

0.06 (1.5 mm)"

0.09 (2.2 mm) "

Lock Wire Hole

Lock Wire Hole

E m

ax

D m

ax

C

BA

0.06 (1.5 mm) "

0.09 (2.2 mm)"

1/4" FITOK

3/8" FITOK

6 mm FITOK

8 mm FITOK

12 mm FITOK

1/4 Female NPT

1/4 Male NPT

1/4 Female BSPT

1/2'' FITOK

1/4" FITOK

3/8" FITOK

1/4 Female NPT

1/4 Male NPT

1/4 Female BSPT

6 mm FITOK

8 mm FITOK

12 mm FITOK

1/2'' FITOK

Dimension in. (mm)

Inlet Size Outlet Size

Connection Sizeand Basic Ordering

Number

6 mm FITOK

1/4" FITOK

1/4 Female NPT

1/4 BSPTFemale

1/4 Female BSPT

1/4 Male NPT

12 mm FITOK

D

2.7(68.8)

4.09(104)

1 /2 Female NPT

1 /2 Male BSPT

F

4.09(104)

5.37(136)

0.43(10.9)

0.5(12.7)

A

1 /2 Female BSPT

1/4" FITOK

1/4 Female NPT

1/4 BSPTFemale

1/4 Female BSPT

1/4 Male NPT

12 mm FITOK

1 /2 Female NPT

1 /2 BSPTMale

1 /2 Female BSPT

1 /2 Male NPT 1 /2 Male NPT

C

1.38(34.9)

1.19(30.2)

1.44( )36.6

1.44(36.6)

1.83(46.5)

B

1.60(40.6)

1.17(29.7)

1.44( )36.6

1.83(46.5)

1.44(36.6)

E

4.14(105)

3.89(98.8)

4.08(103.5)

5.92(150)

5.52(140)

Orificein. (mm)

0.19(4.8)

0.25(6.4)

RL -FL4-7

RL -ML6-7

RL -NS4-7

RL -FNS4-7

RL -RT4-7

RL -FRT4-7

RL -ML12-8

RL -NS8-8

RL -FL8-8

RL -FNS8-8

RL -RT8-8

RL -FRT8-8

□□

□□

□□

□□

□□

□□

□□

□□

□□

□□

□□

□□

Lock Wire Hole

0.06 (1.5 mm)"

Lock Wire Hole

0.09 (2.2 mm) "

F m

ax

Lock Wire Hole

0.06 (1.5 mm) "

Lock Wire Hole0.09 (2.2 mm)"

E m

ax

D

m

ax

C

BA

RL Series

6 mm FITOK

1/2'' FITOK 1/2'' FITOK

5 Proportional Relief Valves Proportional Relief Valves 6

Lock wire with seal

D m

ax

A B

C

E m

ax Lock Wire Hole

0.09 (2.2 mm)"

Lock Wire Hole

0.06 (1.5 mm) "

F m

ax

Lock Wire Hole

0.06 (1.5 mm) "

Lock Wire Hole

0.09 (2.2 mm)"

RM Series

1. FITOK means FITOK double ferrule tube fittings.

2. Dimensions are shown with FITOK nuts finger-tightened. All dimensions are for reference only and are subject to change.

For dimensions not shown above, please contact the authorized representative or .FITOK Group

3. Sizes and types listed are standard. Other sizes and types are available upon request. Refer to ordering information.

1.44(36.6)

1.83(46.5)

RM□□-RT8-8

RM□□-FRT8-8

RM□□-FNS8-8

RM□□-NS8-8

RM□□-ML12-8

RM□□-FL8-8

CBA

Dimension in. (mm)

Inlet Size Outlet Size

Connection and Size

E F

1 /2 Male NPT

12 mm FITOK

1 /2 Male BSPT

1 /2 Female BSPT

1 /2 Female NPT

1 /2 Male NPT

12 mm FITOK

1 /2 Female BSPT

1 /2 Female NPT

1.44(36.6)

1.83(46.5)

4.09(104)

D

0.5(12.7)

5.37(136)

5.52(140)

5.92(150)

0.25(6.4)

Orificein. (mm)

Ordering InformationSpring For Valves

Red 4500～6000 psig (For Series Valves Only)RV

White 2500～3500 psig (For Series Valves Only)RV

Purple 1500～2500 psig (For RV Series Valves Only)

Blue 3500～4500 psig (For Series Valves Only)RV

S177007P RV

Yellow 700～1500 psig (For RV and RM Series Valves)

Green 50～300 psig (For RV and RM Series Valves)

C

W

P

J

Y

F

O Orange 300～700 psig (For RV and RM Series Valves)

Material Part Name

Spring Kit ColorValve Series Valve Orifice Size

RM

RL 0.19"(4.8 mm)RL Series Valves Only

0.14"(3.6 mm)RV Series Valves Only

0.25"(6.4 mm)RL and RM Series Valves

6

7

8

Yellow 10～225 psig (For RL Series Valves Only)

Spring SP

◎ Every spring kit includes a corresponding color label.

NO

L YES

1/2'' FITOK 1/2'' FITOK

Basic OrderingNumber

1 /2 Male BSPT

7PRV SP6 Y L - - -

Ord

eri

ng

In

form

ati

on

Valv

es

1.

Sta

nd

ard

th

rea

d p

itch

fo

r m

etr

ic t

hre

ad

s a

re a

s fo

llo

ws:

M1

0 a

nd

be

low

: 1

mm

M1

2 t

o M

24

: 1

.5 m

m

M2

7 a

nd

ab

ove

: 2

mm

Sta

nd

ard

th

rea

d p

itch

sh

ou

ld b

e i

gn

ore

d i

n t

he

ord

eri

ng

nu

mb

er,

oth

ers

sh

ou

ld b

e s

pe

cifi

ed

.

2.

Cle

an

ing

an

d P

ack

ag

ing

:

FC-0

1:

Sta

nd

ard

cle

an

ing

an

d p

ack

ag

ing

fo

r g

en

era

l in

du

stri

al

pro

ced

ure

s.

FC-0

2:

Spe

cia

l cl

ea

nin

g a

nd

pa

cka

gin

g f

or

we

tte

d s

yste

m c

om

po

ne

nts

to

en

sure

co

mp

lia

nce

wit

h p

rod

uct

cle

an

ing

re

qu

ire

me

nt

as

sta

ted

in

AST

M G

93

Le

vel

C.

3.

Th

e c

olo

r o

f th

e m

an

ua

l o

verr

ide

ha

nd

le i

s b

lack

. Fo

r o

the

r co

lors

,ple

ase

co

nta

ct t

he

au

tho

rize

d r

ep

rese

nta

tive

or

.FI

TO

K G

rou

p

CWP JYF O N

Red

4500～

6000

psi

g

(RV

On

ly)

Wh

ite

2500～

3500

psi

g(R

V O

nly

)

Pu

rple

1500～

2500

psi

g

(RV

On

ly)

Blu

e 3

500～

4500

psi

g

(RV

On

ly)

Yello

w 7

00～

1500

psi

g

(RV

an

d R

M)

Gre

en

50～

300

psi

g(R

V a

nd

RM

)

Ora

ng

e 3

00～

700

psi

g(R

V a

nd

RM

)

Yello

w 1

0～

225

psi

g(R

L O

nly

)

No

sp

rin

g

M

No

ne

Ma

nu

al

Ove

rrid

eH

an

dle

FC-0

1

F2FC

-02

No

NA

CE

MR

0175

S

Han

dle

Sp

rin

g K

it

Co

lor

S

peci

al

Ap

plica

tio

nC

lean

ing

an

d P

ack

ag

ing

B

od

y

Mate

rial

Inle

t Typ

eO

utl

et

Ty

pe

Seri

es

Ou

tle

tS

ize

Inle

t Siz

e

RV

1/8

"

1/4

"

3/8

"

o

r 6

mm

1/2

" o

r 8

mm

10

mm

3/4

" o

r 12

mm

2 4 6 8

10

12

RT

FRT

FRP

BP

FMS

MS

NS

FNS

Fem

ale

NPT

ML

FL

RM

RL

Fem

ale

BSP

T

Male

NPT

Male

BSP

T

Fem

ale

BSP

P(f

or

RP)

Male

BSP

P(f

or

RG

)

Fem

ale

Metr

ic

Th

read

(fo

r R

G)

Male

Metr

ic

Th

read

(fo

r R

G)

Metr

ic T

ub

eFi

ttin

g

Fract

ion

al

Tu

be

Fitt

ing

Sam

e a

s in

let

Spe

cifi

ed

in

th

esa

me

wa

y a

sth

e i

nle

t ty

pe

an

d s

ize

Ori

fice

Siz

e

6 70

.19

"(4

.8 m

m)

RL

On

ly

0.1

4"

(3.6

mm

)R

V O

nly

0.2

5"

(6.4

mm

)R

L an

d R

M8

Seal

Mate

rial

NB E Z

Ne

op

ren

e

Bu

na

N

Eth

yle

ne

pro

pyl

en

e

Flu

oro

carb

on

FKM

Ka

lre

z

32

1 S

S

30

4 S

S

31

6 S

S

31

6L

SS

30

4L

SS

S1

S4

SS

6L

4L

90

4L

90

4L

SS

RV

SS -

FL6

ML8

6Z

WM

LSF2

-

-

-

-

Lock

wir

e

wit

h s

eal No

LY

es

7 Proportional Relief Valves Proportional Relief Valves 8