FV-Series Standard with Flange Connections

Models

FVBF: Brass

FVJF: Cast Iron

FVSF: Cast Steel

FVSSF Stainless Steel
 

  • API 520 & 614 Approved
  • Chatter-free operation
  • Mount in any position
  • Suitable for continuous duty

 

Size Range: 1″ – 2″

Pressures: 2 – 1000 psi

Flow Rate: Up to 150 gpm

INSTALLATION, MAINTENANCE & OPERATION

 

Installation

Fulflo valves can be mounted in any position. A tee may be inserted in the pump discharge line to mount the valve. The correct size of the valve should be installed, preferably matching the pump discharge line. Screw the valve into the nipple in the tee, or in the case of the flange style, bolt the valve to the companion flange screwed into the nipple. When the valve is used for frequent bypassing of oil pressure, its outlet should be piped back to the tank. Care must be taken to have the discharge well below the oil level in the tank to prevent air entrainment and erratic operation.

 

Only if the valve is used as safety or overload relief and operates infrequently may its discharge be piped back into the pump suction line. Frequent or continuous operation under these conditions will cause excessive heating of the oil and possible damage.

 

Setting Valves

Valves may be set with a hydraulic hand pump for cracking pressure. If a test stand is available, the valve should be connected to the discharge header with the pump bypass open, and the bypass gradually closed until the desired pressure registers on the gauge. Adjust valve adjusting screw until valve slightly bleeds at the set bypass pressure and lock adjusting screw.

 

Fulflo valves are not designed to be positive shut-off and will pass a minimal amount of leakage before the set pressure. If a valve is required to bypass a given amount of fluid at a given pressure, a test stand having a flow meter in the pump discharge line must be available. With a valve adjusted for cracking pressure as above, continue closing the bypass until the required flow registers on the flow meter and observe pressure. Readjust pressure, if necessary, to obtain desired pressure at desired flow.

 

Maintenance & Operation

Fulflo valves provide reliable “chatter-free” operations when the system is free of abrasives and foreign matter. Continuous filtration of the liquid used is strongly recommended.


 

TYPICAL DISASSEMBLY OF STANDARD TYPE VALVE

FV-Series Valve Disassembly

To dismantle valve for inspection or cleaning:

 

  1. Remove cap “B”
  2. Remove O-Ring “D”
  3. Remove lock nut “E”
  4. Remove bonnet “I”
  5. Remove adjusting screw “C”
  6. Remove spring “G”
  7. Remove piston “F”
  8. Remove stop ring “H” (Not Recommended-Special tooling is required to install a new stop ring.)

 

Inspect valve bore and piston for wear and scoring. Replace broken or damaged parts. Clean all parts thoroughly and re-assemble by reversing the above procedure.

No Leaking, Dripping, Spills or Venting

The Fulflo FV-Series valve includes a new safer design that prevents liquid and gasses from venting out of the valve during normal operation and adjustment conditions. This valve has been specially designed to prevent the adjusting screw from backing out while making adjustments to the pressure setting. An O-ring has been incorporated around the adjusting screw to further prevent liquid from escaping.

 

Operates Efficiently and Effectively

The FV-Series valves can be mounted in any position with sizes ranging from 3/8” through 2”, and will operate efficiently with any application or viscosity at pressures from 2 to 1000 psi. Flange or screw connections are available in brass, cast iron, steel, or stainless steel. All parts are completely interchangeable and convertible with other Fulflo V-Series valves.

Fulflo Valve Advantages

These valves offer Fulflo’s patented “chatter-free” performance and are ideally suited for hydraulic and lubricating system protection. All Fulflo valves include a patented modulating piston design with absolute or differential pressure operation. Our advanced modulating operation allows Fulflo valves to be used in many different applications including positive displacement or centrifugal pump and system protection. Fulflo valves can be mounted in any position.


 

ASSEMBLY NUMBER IDENTIFICATION CHART

Symbol Number Designation Code Description
1 Series FV
2 Material J
B
S
SS
Cast iron
Brass
Steel
Stainless Steel (300 Series Stainless)
3 Connections None
F
Screw Connections
Flange Connections 300# Flange Class Standard
(250# Flange Class – Cast Iron Standard)
4 Size -2
-3
-4
-5
-6
-7
-8
3/8”
1/2”
3/4”
1”
11/4
11/2
2”
5, 6, 7 ASA
Flange
Rating
None
-150
-600
300# Flange Standard (no designation required)
8 Flange
Style
150# & 600#
only
A
B
C
D
Raised Face, Staggered Bolt Centers
Smooth Face, Staggered Bolt Centers
Raised Face, Bolts on Valve Centerline
Smooth Face, Bolts on Valve Centerline
9 O-Ring
Material

Note: No Teflon O-Rings
may be used
R
RV
RS
RA
EPR
RN
Buna (Standard)
Viton
Silicone
Aflas
Ethylene Propylene
Neoprene
10 Piston
Material
/HS
/SS
/3SS
Hardened Steel
416 Stainless Steel
303 Stainless Steel (For Stainless Valves Only)
11 Spring

 

(+/-1-5 PSI ON ALL SPRING RANGES)
/AS
/US
/WS
/XS
/YS
/ZS
Pressure Range = 3 – 10 psi (spring color: black)
Pressure Range = 7 – 35 psi (spring color: red)
Pressure Range = 30 – 100 psi (spring color: green)
Pressure Range = 60 – 175 psi (spring color: yellow)
Pressure Range = 150 – 350 psi (spring color: white)
Pressure Range = 300 – 500 psi (spring color: blue)
12 Setting Desired Set Pressure

Examples

FVJF-5RV/HS/WS

FV

J

F

-5

RV

/HS

/WS

Series
Cast Iron
Flanged
1”
Viton O-Ring
H.S. Piston
WS Spring

FVJF-5R/HS/WS

FV

J

F

-5

R

/HS

/WS

Series
Cast Iron
Flanged
1”
Buna O-Ring
H.S. Piston
WS Spring

FVJF-5-150AR/HS/WS

FV

J

F

-5

-150

A

R

/HS

/WS

Series
Cast Iron
Flanged
1”
Rating
Style
Buna O-Ring
H.S. Piston
WS Spring

DIMENSIONS & PARTS

Dimensions in Inches

 

Valve Size AA BB
1″ 105/16 31/2
11/4 1113/16 33/4
11/2 125/8 41/16
2″ 155/16 49/16

 

Note: Dimensions reflect 150# and 300# only

Cutaway Drawing

 

Fulflo FV-Series Flange Valve dimensions

Parts List

 

Valve Size

Sym. Name Model 1” 11/4 11/2 2”
A Body FVJF
FVBF
FVSF
FVSSF
500-F
500-BF
500-SF
500-SSF
600-F
600-BF
600-SF
600-SSF
700-F
700-BF
700-SF
700-SSF
800-F
800-BF
800-SF
800-SSF
B Cap FVJF
FVBF
FVSF
FVSSF
501-R
501-BR
501-SR
501-SSR
601-R
601-BR
601-SR
601-SSR
701-R
701-BR
701-SR
701-SSR
801-R
801-BR
801-SR
801-SSR
C Adjusting Screw FVJF
FVBF
FVSF
FVSSF
502-S8
502-B8
502-S8
502-SS8
602-S8
602-B8
602-S8
602-SS8
702-S8
702-B8
702-S8
702-SS8
802-S8
802-B8
802-S8
802-SS8
D O-Ring+
(2 Req.)
FVJF
FVBF
FVSF
FVSSF
504-*
504-*
504-*
504-*
604-*
604-*
604-*
604-*
704-*
704-*
704-*
704-*
804-*
804-*
804-*
804-*
E Lock Nut FVJF
FVBF
FVSF
FVSSF
505-S
505-S
505-S
505-SS
505-S
505-S
505-S
505-SS
505-S
505-S
505-S
505-SS
505-S
505-S
505-S
505-SS
F Piston+ Hardened Steel
416 Stainless Steel
303 Stainless Steel
506
506-A
506-SS
606
606-A
606-SS
706
706-A
706-SS
806
806-A
806-SS
G Spring+ All Models 507-** 607-** 707-** 807-**
H Stop Ring FVJF
FVBF
FVSF
FVSSF
508-S
508-B
508-S
508-SS
608-S
608-B
608-S
608-SS
708-S
708-B
708-S
708-SS
808-S
808-B
808-S
808-SS
I Bonnet FVJF
FVBF
FVSF
FVSSF
523-S4
523-B4
523-S4
523-SS4
623-S4
623-B4
623-S4
623-SS4
723-S4
723-B4
723-S4
723-SS4
823-S4
823-B4
823-S4
823-SS4
J  O-Ring+
(1 Req.)
FVJF
FVBF
FVSF
FVSSF
7003-*
7003-*
7003-*
7003-*
7061-*
7061-*
7061-*
7061-*
7062-*
7062-*
7062-*
7062-*
504-*
504-*
504-*
504-*

PERFORMANCE DATA

 

All valve tests 110˚F to 120˚F Oil Viscosity 150 SSU at 100˚F
(Charts good from 30 to 500 SSU)

V-Series Flange Performance

Overpressure: The pressure increase or accumulation above the set pressure when the valve is discharging flow.