| Model | GD-7 | ||
| Application | Cold and hot water, oil, other non-hazardous liquids | ||
| Nominal size | 20A-50A | 65A-150A | |
| Inlet pressure | 0.1-1.0 MPa | ||
| Low pressure | (A) 0.05-0.25 MPa (B) 0.25-0.45 MPa (C) 0.45-0.7 MPa | (A) 0.05-0.2 MPa (B) 0.2-0.5 MPa (C) 0.5-0.7 MPa | |
| Up to 70% of inlet pressure (gauge) | |||
| Min. differential pressure | 0.05 MPa | ||
| Max. differential pressure | 0.7 MPa | ||
| Max. coeff. pressure reduction | 10: 1 | ||
| Operating temperature | 5-80 ° C * 1 | ||
| Fluid viscosity | No more than 700 cSt | ||
| Material | Frame | Cast iron | |
| Valve, valve seat | Phosphor Bronze * 2 | ||
| Stock | Stainless steel | ||
| Plunger | Bronze | ||
| Compound | Flange connection JIS 10K FF | ||
*1. Available with a maximum operating temperature of 120 ˚C.
* 2. Available with stainless steel valve and valve seat.
Cast steel GD-7H models are available (inlet pressure - no more than 2 MPa, outlet pressure regulation range - 0.7-1.4 MPa).
Leakage through valve seat (l / min):
| Nominal size | twenty | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 |
| Leakage | 0.16 | 0.2 | 0.25 | 0.32 | 0.4 | 0.52 | 0.64 | 0.8 | 1.0 | 1.2 |
- Simple design, less prone to failure, easy maintenance.
- Insensitive to inlet pressure differences due to its dual construction.
- Highly effective when used to relieve the pressure of viscous oils and greases.
| Nominal size | L | H | H 1 | The weight |
| 20A | 170 | 535 | 95 | twenty |
| 25A | 170 | 535 | 95 | twenty |
| 32A | 180 | 545 | 100 | 23 |
| 40A | 180 | 545 | 100 | 23 |
| 50A | 180 | 565 | 110 | 26 |
| 65A | 215 | 680 | 125 | 41 |
| 80A | 260 | 700 | 135 | 51 |
| 100A | 300 | 750 | 160 | 66 |
| 125A | 360 | 810 | 190 | 90 |
| 150A | 382 | 875 | 220 | 129 |
The design differs depending on the nominal size.
Selection chart of technical characteristics
Flow characteristics graph
| Nominal size | Cut-off pressure increase |
| 20A-50A | Not more than 10% of the pressure setting |
| 65A-100A | No more than 15% of the pressure setting |
| 125A-150A | Not more than 20% of the pressure setting |
* Pressure offset
| Nominal size | Pressure displacement, MPa | |
| GD-7 | GD-7H | |
| 20A-50A | No more than 0.08 | No more than 0.23 |
| 65A-150A | No more than 0.11 | No more than 0.18 |
Valve pressure characteristic
This graph shows the change in reduced pressure when the pressure of 0.5 MPa at the valve inlet begins to fluctuate between 0.5 MPa and 1.0 MPa, while the reduced pressure is set at 0.2 MPa.
Nominal sizing diagram (for water)
Delivery
- Pickup from a warehouse in Kiev - is free
- New Mail - at the rates of the delivery service, at the rates of the delivery service, at the rates of the delivery service
- SAT - at the rates of the delivery service
- Deliveri - at the rates of the delivery service
Payment
- Cashless payment with VAT
- Online Privat24, Visa / MasterCard
