1
Functional Description
The 2/2 poppet type directional control valves are
designed to check and open flow of the hydraulic
fluid. Additionally, they can also provide flow
throttling.
The valve consists of the housing (1), the poppet (2) and
the actuating section (3).
Opening and closing of the valve is handled by a
poppet. The poppet is pushed onto the seat by a spring,
thus providing leakfree closure of the valve. The poppet
can be operated by a push hand knob or a hand lever.
The model with the hand knob (3) has 2 operating
positions. After releasing the hand knob, the spring
returns the valve into its closed position. The model with
a hand lever in fact also has only two operating
positions, but the hand lever can be set to 3. position.
These are as follows:
Position 0 , middle hand lever position - the valve is
closed by means of the return spring.
Position I. opens the valve against the return spring.
Position II. actuates a contact (with the model with
micro switch), e.g. in order to turn on the pump motor by
means of a switching relay. With the model without
microswitch, this position also exists, but it does not
have any function.
Caution! The
preferential flow direction is 2 à 1
because of smaller operating forces.
The basic surface treatment of the valve is zinc coating.
HA 4051
7/2012
3/4-16 UNF · p
max
250 bar (3626 PSI) · Q
max
20 L/min (5.3 GPM)
2/2 Hand Operated Directional
Control Valves Poppet Type
SD1M-A2/S
q
Poppet design - leakfree closure
q
Simple design
q
2 models
2
1
2
1
Replaces
HA 4060 10/2007
2
HA 4051
Ordering Code
Seals
no designation
V
Standard (NBR)
Viton (FPM)
Model
1
2
3
with hand knob
with hand lever without microswitch
with hand lever with microswitch
Technical Data
Dp-Q Characteristics Measured at n = 32 mm
2
/s (156 SUS)
Pressure drop Dp
Flow Q [L/min (GPM)]
2
4
6
8
0 3 6 9 12 15 18 20
(0.79) (1.58) (2.38) (3.17) (3.96) (4.75) (5.28)
(29.0)
(58.0)
(116.0)
(87.0)
Valve size A2
Nominal size mm (US)
3/4-16 UNF-2A
Maximum flow L/min (GPM) 20 (5.28)
Max. operating pressure bar (PSI) 250 (3625.9)
Pressure drop bar (PSI) see Dp characteristics
Hydraulic fluid Hydraulic oils of power classes (HL, HLP) to DIN 51524
Fluid temperature range - NBR °C (°F) -30 ... +100 (-22... +212)
Fluid temperature range - Viton °C (°F) -20 ... +120 (-4 ... +248)
Viscosity range mm
2
/s (SUS) 10 ... 500 (49 ... 2450)
Maximum degree of fluid contamination Class 21/18/15 to ISO 4406
Weight - model 1
model 2
model 3
kg (lbs)
0.274 (0.604)
0.381 (0.840)
0.383 (0.844)
Service life cycles 10
6
Mounting position unrestricted
Valve body ( data sheet HA 0018) SB-A2
Microswitch D2SW-3D
Enclosure type of microswitch to EN 60529 IP 67
Microswitch data
2A - 250 V ~
0,1A - 30 V =
SD1M-A2/SL
2 Way Poppet Type Valve
Hand Operated - 3/4-16 UNF
Description
Normally closed
1 ® 2
2 ® 1
Pressure drop Dp related to flow rate.
3
HA 4051
Spare Parts
SD1M-A2/SL
531-0505
0606/01
129.5(5.10)
Æ
40(1.57)
4 3 2 1
15(0.59)
28(1.10)
HEX 24 ( 26.5)
Æ
Æ
24(0.94)
3/4-16 UNF-2A
Æ
12.65
(0.50)
22
1
(
(
,
R 0,2 R 0,2
Valve Dimensions Dimensions in millimeters (inches)
Seal kit
Type
Dimensions, quantity
Ordering number
O-Ring Dualseal - PU
Standard - NBR 17 x 1,8 (1ks) 10,3 x 12,7 x 3,1 (1ks) 22752500
Viton 17,17x1,78 (1ks) 10,3 x 12,7 x 3,1 (1ks) 22752600
1 Push hand knob
2 Outside hexagon 24 mm (0.94 inch)
Tightening torque 30 Nm (22.1 lbs)
3 Seal: O-ring 17 x 1,8
(supplied with valve)
4 Seal:
Dualseal 10,3 x 12,7 x 3,1
(supplied with valve)
Typ: SD1M-A2/SL1
Cavity Dimensions in millimeters (inches)
4
HA 4051
Valve Dimensions Dimensions in millimeters (inches)
Caution!
The packing foil is recyclable.
The technical information regarding the product presented in this catalogue is for descriptive purposes only. It should
not be construed in any case as a guaranteed representation of the product properties in the sense of the law.
1 Hand lever
0 middle arrested position
I. first position - opens the valve
II. second position - closes the contact of the microswitch
2 Segment of the hand lever
3 Microswitch -only with SD1M-A2/SL3
24 A/F - 26.5(1.04)
Æ
Æ
24(0.94)
3/4-16 UNF-2A
Æ
12.65
-
0025
15(0.59)
28(1.10)
99.6(3.92)
SD1M1-A2/SL
531-0507
0606/01
38(1.50)
175(6.89)
45(1.77)
35(1.38)
0.
II.
I.
1
2
3
(0.50/0.49)
2
1
Position 0, I.
Position II.
Electric circuit
Subject to alteration without notice!
ARGO-HYTOS s.r.o. CZ - 543 15 Vrchlabí
Tel.: +420-499-403111, Fax: +420-499-403421
E-mail: sales.cz@argo-hytos.com
www.argo-hytos.com
Typ: SD1M-A2/SL2 and SD1M-A2/SL3
