AFK Stainless Steel 1/4inch 3/8inch 1/2inch Gas Safety Valve Industrial
Product Description of Gas Safety Valve
operate
■ When the system pressure reaches the set pressure, the safety valve is turned on, and the system pressure falls to below the set pressure.
■ Safety valve selection and installation covers the need to set the pressure to set pressure, and put the corresponding label on the cap cover.
■ For valves that have not been used for a period of time, the initial pressure of the initial loading may be higher than the set pressure.
■ Set pressure and re -seal pressure
Setting pressure is the upstream pressure when there is a fluid for the first time. At room temperature, after the initial load is completed, the set pressure of each valve can be repeated within the range of ± 5 %.
The sealed pressure is the upstream pressure when the flowing body flows out, and the sealed pressure is always lower than the set pressure
test
Each series of proportion of load -unloading valves must be tested by setting performance and re -sealing performance.
|
Series |
Setting pressure for Test psig (bar) | As the minimum sealing pressure of setting pressure percentage % |
| RV | 10-20 (0.38 to 1.3) | 50 |
| 175-225 (12 to 15.5) | 91 | |
| RVH | 100 to 200 (6.8 to 13.7) | 50 |
| 850-1000 (58.5-68.9) | 84 |
Product Details of Gas Safety Valve
Back pressure
■ High pressure valve (RVH)
Through the design of these high -voltage valves, the impact of the system back pressure is minimized.
■ Low pressure valve (RV)
The back pressure of the system will increase the set pressure of the valve. In order to compensate, subtract the results from 0.8 and subtract the results obtained from the required setting pressure.
When the back pressure is equal to atmospheric pressure, the results obtained by the application are preset.
For example: the set pressure required is 120 PSIG. The back pressure of the system is 40 PSIG.
Step 1. Back pressure is multiplied by 0.8.40 PSIG X 0.8 = 32 PSIG.
Step 2. Subtract the result from the required setting pressure. 120 PSIG -32 PSIG = 88 PSIG.
Step 3. Preset the proportion of the proportional load valve on 88 PSIG.
RVH series
■ Used for liquid or gas
■ Set the pressure: 7 kinds of spring can be selected, which increases the range of selection of the setting pressure.
■ Inner diameter: 3.6mm
■ Balanced valve stem design, eliminating the effects of back pressure on tidy pressure
■ Work temperature: -23 ℃ to 148 ℃ (-10 ° F to 300 ° F)
■ Adjustable valve cap, adjustable and setting pressure
■ Anti -pine holes can effectively maintain the setting of settings
■ Various sealing materials are available
■ Label label the range of the whole pressure
■ When the setting pressure is lower than 1500PSIG
Control the handle, this handle can open the valve without changing the setting pressure
■ Conncetion size:
1/4 “to 1/2″, 6 to 12 mm dual card sets
1/4 “to 1/2″ thread
RV series
■ Used for liquid or gas
■ Set pressure: 10 to 60psig (0.68 to 3.9bar)
■ Inner diameter: 4.0mm
■ Preset pressure = required pressure -0.8* Back pressure
■ Work temperature: -23 ℃ to 148 ℃ (-10 ° F to 300 ° F)
■ Adjustable valve cap, adjustable and setting pressure
■ Anti -pine holes can effectively maintain the setting of settings
■ Various sealing materials are available
■ Label label the range of opening pressure
■ When the setting pressure is lower than 1500PSig, you can choose an artificial super -pitch control handle.
This handle can open the valve without changing the whole pressure
■ Interface size:
1/8 “to 1/2″, 3mm to 12mm dual card set
1/4 “to 1/2″ thread
Model Selection
RVH-SS-MN4-FN4-A-B
| Series | body material | Inlet type | Inlet size | Outlet type size | Spring color | sealing material | ||||||
| RVH | SS | MN | 4 | FN4 | A | B | ||||||
| RV | SS | 316 | FN | NPT Female Thread | 2 | 1/8″or2mm | Same as import | RV Series Only one spring selection | Fluoroelastomer (FKM) | |||
| RVH | MN | NPT Male thread | 3 | 3mm | The identification method is the same as that of the inlet when it is different from the inlet size type | A | silvery（10-60psi） | B | Nitrile butadiene rubber (NBR) | |||
| FPT | ISO Female Thread | 4 | 1/4″or4mm | RVH Series | E | Ethylene propylene (EPDM) | ||||||
| PT | ISO Male thread | 6 | 3/8″or6mm | A | silvery（60-350psi） | N | Neoprene (CR) | |||||
| FMS | Metric Female Thread | 8 | 1/2″or8mm | B | yellow（350-750psi） | Z | Perfluorinated rubber (Kairez) | |||||
| MS | Metric Male thread | 10 | 10mm | C | blue（750psi-1500psi） | |||||||
| FG | British straight pipe Female thread | 12 | 12mm | D | red（1500-2500psi） | |||||||
| GD | British straight pipe male thread (face seal) | E | green（2500-3500psi） | |||||||||
| GT | British straight pipe male thread（root seal） | F | brown（3500-4500psi） | |||||||||
| FF | British double ferrule | G | black（4500-6000psi） | |||||||||
| MF | Metric double ferrule | |||||||||||
Q1. What is your terms of packing?
A: Export standard.
Q2. What is your terms of payment?
A: T/T ,PayPal, Western Union.
Q3. What is your terms of delivery?
A: EXW.
Q4. How about your delivery time?
A: Generally, it will take 5 to 7 days after receiving your full payment. The specific delivery time depends on the items and the quantity of your order.
Q5. Can you produce according to the samples?
A: Yes, we can produce by your samples or technical drawings. We can build the molds and fixtures.
Q6. What is your sample policy?
A: We can supply the sample if we have ready parts in stock, but the customers have to pay the sample cost and the courier cost.
Q7. Do you test all your goods before delivery?
A: Yes, we have 100% test before delivery
Q8: How do you make our business long-term and good relationship?
A:1. We keep good quality and competitive price to ensure our customers benefit ;
A:2. We respect every customer as our friend and we sincerely do business and make friends with them,no matter where they come from.
