A-Series Direct Acting with Threaded Connections

Models

AAD:  Cast Iron

ACD: Cast Steel

ASSD: Stainless Steel
 

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

 

Size Range: 2.5″ and 3″

Pressures: 7 – 150 psi

Flow Rate: 150 – 350 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 pipelines carrying the heavy valves must be well supported and overhung weights avoided. The correct size of the valve must be used, preferably equal to the size of the pipeline to which they are connected. Threaded valves (AAD and ACD) may be threaded into pipe nipples. Overhung weights on threads should be avoided. The outlet of the valve should be piped to the supply tank unless specific applications call for alternate piping of return lines. Care must be taken to have the discharge well below the oil level in the tank to prevent air entrainment and erratic operation.

 

Setting Valves

The valve 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. For Direct Acting valves, adjust valve adjusting screw until valve slightly bleeds at the set bypass pressure and lock adjusting screw.  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 adjusting 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

A-Series Direct Acting Valve Disassembly

To dismantle the valve for inspection or cleaning:

  1. Remove cap “A” and O-ring “D”
  2. Remove lock nut “C”
  3. Remove adjusting screw “B”
  4. Remove cap screws “E”
  5. Remove bonnet “F”
  6. Remove gasket “G”
  7. Remove spring retainer “H”
  8. Remove spring or springs “I” and “J”
  9. Remove piston “M”
  10. Unscrew and withdraw cylinder “K”
  11. Remove retaining bushing “N” if necessary

 

Inspect cylinder bore and piston for wear or scoring. Replace broken or damaged parts. Clean all parts thoroughly and re-assemble as follows:

  1. Reverse process of disassembly from operation 11 to 6 above
  2. Thread adjusting screw “B” into bonnet “F” so that it may be guided into the recess of spring retainer “H”, while re-assembling bonnet “F” to body “L.”
  3. Then proceed with steps 5, 4, 2, & 1 above, in reverse order

ASSEMBLY NUMBER IDENTIFICATION CHART

Symbol Number Designation Code Description
1 Series A
2 Material A
C
SS
Cast Iron
Cast Steel
Stainless Steel
3 Type D
P
Direct Acting
Internal Pilot Operated
4 & 5 Size 09
10
11
21/2
3”
4”
6 Connection None
F
Screw Type (21/2″ and 3” only)
Flange
7, 8, 9 ASA Flange
Rating
150# 300#
600#
10 Flange Style
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
11 O-Ring
Material
R
RV
RS
RT
RA
EPR
RN
Buna O-Ring Cap Seal (Standard)
Viton O-Ring Cap Seal
Silicone O-Ring Cap Seal
Teflon O-Ring Cap Seal
Aflas O-Ring Cap Seal
Ethylene Propylene
Neoprene
12 Piston
Material
/HS
/SS
/3SS
Hardened Steel
416 Stainless Steel
303 Stainless Steel (For Stainless valves only)
13 Spring

 

(+/-1-5 PSI ON ALL
SPRING RANGES)
A0960 D
A0961C
A0960D & A0970D
A0961C & A0971C
A1060D
A1061C
A1060D & A1070D
A1061C & A1071C
A1160D
A1160D & A1170D
Pressure Range = 7 –57 psi
Pressure Range = 8 – 75 psi
Pressure Range = 14 – 115 psi
Pressure Range = 16 –150 psi
Pressure Range = 5 – 50 psi
Pressure Range = 5 – 67 psi
Pressure Range = 10 –100 psi
Pressure Range = 10 –135 psi
Pressure Range = 2 – 37 psi
Pressure Range = 4 – 75 psi
14 Setting Desired Set Pressure

Example

ACD09R

A
C
D
09
R
Series
Steel
Direct Acting
21/2
Buna

How to Order

Specify:

  1. Valve Model Number (1-10)
  2. O-Ring Identification Number (11)
  3. Piston Material (12)
  4. Spring Part Number (13)
  5. Spring Pressure Range or Desired Pressure Setting (14)

DIMENSIONS & PARTS

Dimensions in Inches

 

Valve Size AA BB CC DD
21/2″ 159/16 51/2 51/16 4
3″ 171/2 65/8 63/8 4

Cutaway Drawing

A-Series Direct Acting Valve dimensions

Parts List

 

Valve Size

Symbol Name Model 21/2 3”
A Cap AAD, ACD
ASSD
A1101CR
A1101SSR
A1013CR
A1013SSR
B Adjusting Screw AAD, ACD
ASSD
A0922C
A0922SS
A1022C
A1022SS
C Lock Nut AAD, ACD
ASSD
605-S
605-SS
705-S
705-SS
D O-Ring+ AAD, ACD
ASSD
604-*
604-*
704-*
704-*
E Cap Screw All Models 3/8×1 SHCS 3/8×1 SHCS
F Bonnet AAD
ACD
ASSD
A0909A
A0909C
A0909SS
A1009A
A1009C
A1009SS
G Gasket+ AAD, ACD
ASSD
A0903E
A0903RT
A1003E
A1003RT
H Spring Retainer AAD, ACD
ASSD
A0916C
A0916SS
A1016C
A1016SS
I Spring+ All Models See Chart* See Chart*
J Spring+ All Models See Chart* See Chart*
K Cylinder+ AAD, ACD
ASSD
A0908C
A0908SS
A1008C
A1008SS
L Body AAD
ACD
ASSD
A0900A
A0900C
A0900SS
A1000A
A1000C
A1000SS
M Piston+
Hardened Steel
416 Stainless Steel
303 Stainless Steel

AAD, ACD
AAD, ACD
ASSD (only)

A0906C
A0906D
A0906SS

A1006C
A1006D
A1006SS
N Retainer Bushing AAD, ACD
ASSD
A0911C
A0911SS
A1011C
A1011SS

PERFORMANCE DATA

 

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

(Charts good from 30 to 500 SSU)

A Series Direct Acting performance data

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