Table 1. Orifice Selection

Flow Control Servovalves
Bulletin HY14-1450-M1/US
Bul 1450-M1pgs.p65, dd
11
Parker Hannifin Corporation
Hydraulic Valve Division
Elyria, Ohio, USA
Ordering Information
Series BD15 and BD30
Code
Description
N
Nitrile (Std.)
V
Fluorocarbon
Connector
Seals
Basic Model
BD
Code Description
A
Standard Valve
B
Intrinsic Safe,
Factory Mutual
C
Explosion Proof,
Factory Mutual
J
Explosion Proof,
CSA Approved
N
Explosion Proof,
ATEX Approved
See Note 1.
Flow
Supply
Pressure
Code
Description
B
2600–3000
(Standard)
C
2000–2500
D
1400–1950
E
1000–1300
F
700–950
G
200–650
H
0–3000
(5th Port)
See Note 3.
Code
15
30
Size
Options
Coil
Mounting Bolt Kit (U.S.)
BD15
BK07 (4) 5/16-18 x 1
BD30
BK46 (4) 5/16-10 x 3 1/4
BD 15
Code
Flow (GPM)
1
3.8 LPM (1 GPM)
2.5
9.5 LPM (2.5 GPM)
5
18.9 LPM (5 GPM)
10
37.9 LPM (10 GPM)
15
56.8 LPM (15 GPM)
20
75.7 LPM (20 GPM)
BD 30
Code
Flow (GPM)
20
75.7 LPM (20 GPM)
25
94.6 LPM (25 GPM)
30
113.6 LPM (30 GPM)
40
151.4 LPM (40 GPM)
BD30
Code
Description
E
C
2
B (Std.)
F
C
2
D
G
C
1
B
H
C
1
D
K
Intrinsic Safe
M
Explosion Proof
See Note 2.
BD15
Code
Description
A
C
2
B (Std.)
B
C
2
D
C
C
1
B
D
C
1
D
J
Intrinsic Safe
L
Explosion Proof
Code
m(A)
Ohm
A
60 (Std.) 60
B
15
1016
C
20
591
D
30
243
E
40
138
F
50
90
G
100
22
H
200
5.7
J*
30/30
118/118
K
80
36
* For intrinsic safe only.
Note 1: “B” Intrinsic Safe Option meets Factory Mutual
Intrinsically Safe Class I, II and III, Division 1
Groups A through G. Refer to Parker Bulletin 1452.
“C” Explosion Proof meets:
Factory Mutual Explosion Proof
Class I, II, III, Division 1, Groups A through G
“J” Exposion Proof meets:
Canadian Standards Association
Class I, Groups A through D
Class II, Groups E, F and G
Class III
Refer to Parker Bulletin 1451.
“N” Explosion Proof meets:
ATEX Ex II2G EExm II T3 T
amb 
45°C to -50°C
Request Parker Documentation Package: 1200074
Note 2: Connector Location & Flow Polarity
(Standard connector over C
2
+ to B = P to C
1
flow).
C
2
B = Connector over Port C
2'
+ to Pin B = P to C
1
flow.
C
2
D = Connector over Port C
2'
+ to Pin D = P to C
1
flow.
C
1
B = Connector over Port C
1'
+ to Pin B = P to C
1
flow.
C
1
D = Connector over Port C
1'
+ to Pin D = P to C
1
flow.
Note 3: Supply Pressure: Code “H” applies to 5th Port/External
Pilot Option. This requires the use of a blank orifice “-
00”. First stage pressure should be limited to 41.4 Bar
(600 PSI) and no less than 27.6 Bar (400 PSI).
Servo valve rated flow at 1000 PSID ±10%.

Bulletin HY14-1450-M1/US
Bul 1450-M1pgs.p65, dd
Flow Control Servovalves
12
Parker Hannifin Corporation
Hydraulic Valve Division
Elyria, Ohio, USA
Troubleshooting
Series BD15 and BD30
Table 2. Service Suggestions
Symptom
Possible Cause
To Verify or Correct
1. Open coil wire or open coil lead to 
connector pin.
1. Check lead and coil resistance. If there is 
an "open", remove the connector and 
check it's solder joints. Resolder if 
required.
2. Totally plugged supply orifice or 
filter.
2. Remove and inspect filter and orifice per 
Maintenance Section.
3. Spool stuck.
3. Return to factory.
1. Partially plugged:
1. Clear the blockage
a. Filter element
a. Inspect filter per Maintenance Section
b. Orifice
b. Inspect orifice per Maintenance 
Section.
c. Pilot Valve
c. Return to factory.
2. Leaky sleeve o-rings.
2. Investigate excessive internal leakage to 
tank (bypassing flow sound)
3. Low pilot supply pressure.
3. Check pilot supply pressure per 
Maintenance Section. 
4. Cylinder piston ring failure.
4. Check cylinder (listen for bypassing 
sound.)
5. Shorted coil.
5. Check coil resistance in accordance with 
Maintenance Section, Electrical Checkout.
6. Low supply pressure.
6. Verify that the supply pressure to the 
valve falls within the range noted on the 
valve nameplate.
1. Incorrect null adjust.
1. Adjust null per Servovalve Maintenance 
Section.
2. Partially plugged receiver.
2. Return valve to factory.
1. Valve improperly phased.
1. Swap the two leads to the valve coil to 
change the polarity of the current to the 
coil.
2. Plugged pilot valve receiver port.
2. Return valve to factory.
3. Spool stuck.
3. Return valve to factory.

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