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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