SVB-Series Standard with Threaded Connection

Models

SVB: Brass

Specially designed for flammable fluids
UL 842 Approved
API 614 & 520 Approved
Chatter-free operation
Mount in any position
Suitable for continuous duty

Size Range: 3/8″ – 2″
Pressures: 3 – 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

Valve may be set with a hand pump for cracking pressure. It will be noted that the maximum set pressure is limited by the collar “J” soldered to the adjusting screw “C”.

If a test stand is available, 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.

If 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 valve adjusted for cracking pressure as above, continue closing bypass until the required flow registers on the flow meter and observe pressure. Re-adjust 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

To dismantle valve for inspection or cleaning:

Remove cap “B”
Remove gasket “E” (replace, if necessary)
Loosen lock nut “F”
Remove adjusting screw “C” (Limit collar “J” is soldered to adjusting screw “C”, to limit the maximum pressure to which the valve may be subjected.) Limit collar is set at 25% above normal pressure setting.
Remove lock nut “F”
Remove retainer “D”
Remove spring “G”
Remove piston “I”
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 ID CHART

Example

How to Order

Specify:

1. Valve Model Number
2. Spring Letter
3. Piston Number
4. Pressure Setting

NOTE: A definite prevssure setting is required due to Underwriter restrictions. A limiting device is furnished to prevent over-adjustment more than 25% above set pressure.