Grooved flexible couplings are widely used to connect steel pipes for fire protection system, potable water supply system, municipal construction, mine, chemical factory and other occasions when steel pipes used.
Detailed description:
Material of body: ductile cast iron (ASTM A536,Grade: 65-45-12)
Material of gasket: EPDM/NBR
Nominal size: 1"-12"
Working pressure: 2.07MPa / 300PSI
Surface treatment: electrostatics powder painting, RAL3000, blue, white or as customized.
Bolts and nuts: export grade, stainless steel
All sizes are UL listed and FM approved.
Detailed description:
Material of body: ductile cast iron (ASTM A536,Grade: 65-45-12)
Material of gasket: EPDM/NBR
Nominal size: 1"-12"
Working pressure: 2.07MPa / 300PSI
Surface treatment: electrostatics powder painting, RAL3000, blue, white or as customized.
Bolts and nuts: export grade, stainless steel
All sizes are UL listed and FM approved.
| Nominal size inch / mm | Pipe OD inch / mm | Working Pressure PSI / MPa | Product Dimension (inch / mm) | Bolt/Nut | ||
| Φ | L | H | ||||
| 1 25 | 1.327 33.7 | 300 2.07 | 2.205 56 | 3.780 96 | 1.772 45 | 10*45 |
| 1 1/4 32 | 1.669 42.4 | 300 2.07 | 2.598 66 | 4.173 106 | 1.772 45 | 10*45 |
| 1 1/2 40 | 1.9 48.3 | 300 2.07 | 2.835 72 | 4.488 114 | 1.772 45 | 10*45 |
| 2 50 | 2.375 60.3 | 300 2.07 | 3.189 81 | 4.961 126 | 1.850 47 | 10*50 |
| 2 1/2 65 | 2.875 73 | 300 2.07 | 3.740 95 | 5.472 139 | 1.850 47 | 10*55 |
| 3 (OD) 65 | 3 76.1 | 300 2.07 | 3.898 99 | 5.630 143 | 1.850 47 | 10*55 |
| 3 80 | 3.5 88.9 | 300 2.07 | 4.409 112 | 6.181 157 | 1.890 48 | 10*55 |
| 4 100 | 4.5 114.3 | 300 2.07 | 5.433 138 | 7.598 193 | 1.969 50 | 12*65 |
| 5 1/2 (OD) 125 | 5.5 139.7 | 300 2.07 | 6.535 166 | 8.701 221 | 1.969 50 | 12*70 |
| 6 1/2 (OD) 150 | 6.5 165.1 | 300 2.07 | 7.598 193 | 9.843 250 | 2.008 51 | 12*70 |
| 6 150 | 6.625 168.3 | 300 2.07 | 7.717 196 | 10.079 256 | 2.008 51 | 12*70 |
| 8 200 | 8.625 219.1 | 300 2.07 | 10.000 254 | 12.677 322 | 2.480 63 | 16*85 |
| 10 250 | 10.75 273 | 300 2.07 | 12.323 313 | 15.433 392 | 2.520 64 | 20*100 |
| 12 300 | 12.75 323.9 | 300 2.07 | 14.409 366 | 17.520 445 | 2.598 66 | 20*110 |
UL list and FM approval
in cartons and then on pallets 
pipe cutting machine, hole cutting machine, roll groove machine etc.
1. Q: What's your MOQ?
A: Generally, it's 200 pieces for each size. For trial order, MOQ can be negotiated.
2. Q: Where is your factory located? What's the nearest air port and and how long it will take from airport to factory?
A: Our factories are located in Shandong province, east of China. It's about 2 hours from factory to Qingdao airport.
3. Q: What's your lead time?
A: In peak season, it needs about 35 days; In off-season about 21 days.
4. Q: What the payment terms required?
A: 1) T/T 30% and the balance against of B/L copy sent to you;
2) L/C at sight
3) For small order, West Union, paypal or cash accepted.
5. Q: Can products be customized?
A: Customized products are welcome. Mould fee be paid by customer first and then be refundable to customer
when order quantities reach the required tons.
Anything uncertain or unclear, please feel free to contact me.