SCREW TYPE FOR HYDRAULIC CYLINDERS – BALL – MQS-SC

TECHNICAL DATA

SIZE

WORKING
PRESSURE
Dynamic

RATED FLOW
at 0.2 MPa of
pressure drop

OIL SPILLAGE
Connection /
Disconnection

MINIMUM BURST PRESSURE

CONNECTION /
DISCONNECTION
UNDER
PRESSURE

DN

inch

Dash

MPa

PSI

l/min

US
GPM

cc.

cubic
inch

Male

Female

M & F

MPa

PSI

MPa

PSI

MPa

PSI

6 1/4 4 72 10,440 11 2.9  0.4 0.024 350 50,750 310 44,950 320 46,400 Allowed Max. 10 MPa*
10 3/8 6 72 10,440 26 7.0 0.6 0.037 290 42,050 300 43,500 290 42,050 Allowed Max. 10 MPa*
The rated flow represents the normal operating condition.The maximum recommended flow rate is equal to 1.5 times the rated flow
*In one part

PRODUCT DESCRIPTION

• Screw-type couplings specially designed for very high static pressure applications on cylinders and hydraulic rams
• Connection and disconnection is made by screwing the sleeve and can be made with residual pressure in the line
• Connection secured on the thread between the sleeve and the male coupling
• Shut-off by ball valve provides effective hydraulic sealing
• Interchangeable with other products and widely used in the USA and Europe
• ISO 14540 compliant

MATERIAL

Female and male coupling in steel. Carbonitrided valve, springs in C98 steel, seals in NBR (other materials available on request) and back-up ring in PTFE

WORKING TEMPERATURE

-22ºF up to +230ºF (-30ºC up to +110ºC)
Specific seals available in case of higher temperatures

SAFETY FACTOR

4:1 for dynamic pressures

IMPULSE PRESSURES

10,000 cycles at 100% of the rated one (freq. 1Hz)

TEST SPECIFICATIONS

ISO 18869

NPT
Q05611280C Q05510341C
Q05611280C
NPT TERMINATION ENDS TO ANSI B1.20.3
SIZE PART NUMBER THREAD DIMENSIONS mm
DN Inch Dash Female coupling Male coupling A B C D E F
6.3 1/4" -04 Q05611280C-04-04 1/4" NPTF 62.4 A+B-19 ⌀30 21
10 3/8" -06 Q05611280C-06-04 1/4" NPTF 75.6 A+B-25 ⌀35,6 25
10 3/8" -06 Q05611280C-06-06 3/8" NPTF 75.6 A+B-25 ⌀35,6 25

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Q05510341C
NPT TERMINATION ENDS TO ANSI B1.20.3
SIZE PART NUMBER THREAD DIMENSIONS mm
DN Inch Dash Female coupling Male coupling A B C D E F
6.3 1/4" -04 Q05510341C-04-04 1/4" NPTF 32 A+B-19 22
10 3/8" -06 Q05510341C-06-04 1/4" NPTF 39 A+B-25 27
10 3/8" -06 Q05510341C-06-06 3/8" NPTF 39 A+B-25 27

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