SCREW TYPE – MQS-SG

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 35 5,075 10 2.6  0.8 0.049 145 21,025 190 27,500 190 27,550 Allowed max. 12 MPa
10 3/8 6 35 5,075 34 9.0 1.5 0.092 150 21,750 160 23,200 150 21,750 Allowed max. 10 MPa
12 1/2 8 30 4,350 61 16.1 2.0 0.122 130 18,850 140 20,300 140 20,300 Allowed max. 10 MPa
19 3/4 12 30 4,350 100 26.4 5.0 0.305 130 18,850 130 18,850 140 20,300 Allowed max. 10 MPa
25 1 16 25 3,625 173 45.7 9.0 0.549 110 15,950 110 15,950 110 15,950 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

PRODUCT DESCRIPTION

• Screw-type couplings specially designed for heavy duty, high pressure, pressure impulse applications such as hammers, attachments, rock crushers, etc.
• Connection and disconnection is made by screwing the sleeve, also possible with residual pressure in the line
• Connection secured on the thread between the sleeve and the male coupling
• Shut-off by poppet valve
• Hexagon around the male insert to be tightened up or released for maintenance
• Interchangeable with similar products available on the market
• Up to size DN 20 ISO 14541 compliant

MATERIAL

Female coupling in steel, male couplings high standard carbon 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)

SAFETY FACTOR

4:1 for dynamic pressures

IMPULSE PRESSURES

200,000 cycles at 133% of the rated one (freq. 1Hz) disconnected; 500,000 connected

TEST SPECIFICATIONS

ISO 18869

Find out more with our Q.Safe Catalogue