OV-Series Standard with Threaded Connections

Models

OVB: Brass

OVJ: Cast Iron

OVS: Cast Steel

OVSS: Stainless Steel

OVJ‐SP: Cast Iron with Steel Parts

 

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

 

Size Range: 1/2″ – 2″
Pressures: 10 – 500 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 APPLICATIONS

Fulflo OV Series Applications

OV-Series Valve Disassembly

To dismantle valve for inspection or cleaning:

 

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


 

ASSEMBLY NUMBER IDENTIFICATION CHART

Symbol Number Designation Code Description
1 Style None Standard Model
2 Series OV
3 Material J
B
S
SS
Cast Iron
Brass
Steel
Stainless Steel (300 Series Stainless)
4 Connections None
F
Threaded Connections
Flange Connections 300# Flange Class Standard
(250# Flange Class – Cast Iron standard)
5 Size -3
-4
-5
-6
-7
-8
1/2”
3/4”
1”
11/4
11/2
2”
6, 7, 8 ASA
Flange
Rating
None
-150
-600
300# Flange Standard (no designation required)
9 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
10 O-Ring
Material
R
RV
RS
RA
EPR
RN
Buna (standard)
Viton
Silicone
Aflas
Ethylene Propylene
Neoprene
11 Options SP Steel Parts (used on Cast Iron valves only)
12 Piston
Material
/HS
/SS
/3SS
Hardened Steel
416 Stainless Steel
303 Stainless Steel (For Stainless valves Only)
13 Spring

 

/WS
/XS
/YS
/ZS
See Chart Below for Pressure Ranges
14 Setting Desired Set Pressure

Examples

OVJ-5RVSP/HS/WS

OV

J

-5

RV

SP

/HS

/WS

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

OVJ-5R/HS/WS

OV

J

-5

R

/HS

/WS

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

OVJ-5-150AR/HS/WS

OV

J

-5

-150

A

R

/HS

/WS

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

Standard Pressure Range Chart

 

Spring Pressure & Identification No.

GREEN-WS YELLOW-XS WHITE-YS BLUE-ZS
Valve Pipe Size Valve Flange Size Low High Low High Low High Low High
1/2″ 40 100 75 150 150 300 250 500
3/4″ 30 80 70 140 130 250 150 450
1″ 1″ 10 50 25 100 40 150 125 300
11/4″ 11/4″ 10 50 25 100 40 150 125 300
11/2″ 11/2″ 30 100 60 175 150 350 300 500
2″ 2″ 30 100 60 175 150 350 300 500

+/- 1-5 PSI on all spring ranges


DIMENSIONS & PARTS

Dimensions in Inches

 

Valve Size AA BB CC DD – ref
3/8″ 511/32 13/8 13/8 13/8
1/2″ 63/16 111/16 17/16 17/16
3/4″ 615/16 115/16 113/16 111/16
1″ 87/32 29/32 29/32 21/16
11/4 99/16 29/16 29/16 21/2
11/2 111/16 211/16 211/16 27/8
2″ 13 3 3 31/4

Cutaway Drawing

 

OV-Series Valve Dimension

Parts List

 

Valve Size

Sym. Name Model 1/2” 3/4” 1” 11/4 11/2 2”
A Body OVJ, OVJ-SP
OVB
OVS
OVSS
300-33
300-B33
300-S33
300-SS33
400-26
400-B26
400-S26
400-SS26
500-39
500-B39
500-S39
500-SS39
600-25
600-B25
600-S25
600-SS25
700-27
700-B27
700-S27
700-SS27
800-30
800-B30
800-S30
800-SS30
B Cap OVJ, OVJ-SP
OVB
OVS
OVSS
301-S
301-B
301-S
301-SS
401
401-B
401-S
401-SS
501
501-B
501-S
501-SS
601
601-B
601-S
601-SS
701
701-B
701-S
701-SS
801
801-B
801-S
801-SS
C Adjusting Screw OVJ, OVB
OVS, OVJ-SP
OVSS
302-B
302-S
302-SS
402-B
402-S
402-SS
502-B
502-S
502-SS
602-B
602-S
602-SS
702-B
702-S
702-SS
802-B
802-S
802-SS
D Retainer OVJ, OVB
OVS, OVJ-SP
OVSS
303-B
303-S
303-SS
403-B
403-S
403-SS
503-B
503-S
503-SS
603-B
603-S
603-SS
703-B
703-S
703-SS
803-B
803-S
803-SS
E Piston O-Ring+ All Models 224-* 424-* 204-* 7073-* 7069-* 7064-*
F Lock Nut OVJ, OVJ-SP, OVS, OVB
OVSS
305-S
305-SS
405-S
405-SS
505-S
505-SS
605-S
605-SS
705-S
705-SS
805-S
805-SS
G Spring+ All Models 207-** 307-** 407-** 507-** 607-** 707-**
H Stop Ring OVJ, OVB
OVS, OVJ-SP
OVSS
308-B
308-S
308-SS
408-B
408-S
408-SS
508-B
508-S
508-SS
608-B
608-S
608-SS
708-B
708-S
708-SS
808-B
808-S
808-SS
I Piston+ Hardened Steel
416 Stainless Steel
303 Stainless Steel
306-21
306-A21
306-SS21
406-22
406-A22
406-SS22
506-32
506-A32
506-SS32
606-32
606-A32
606-SS32
706-25
706-A25
706-SS25
806-23
806-A23
806-SS23

PERFORMANCE DATA

 

All valve tests 110˚F to 120˚F Oil Viscosity 150 SSU at 100˚F

(Charts good from 30 to 500 SSU)

 

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