Oxygen pressure regulating valve group-Fornitore globale

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Oxygen pressure regulating valve group

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OXT oxygen pressure regulating valve group

1. Product Introduction and Usage
This product is suitable for oxygen pipelines, oxygen (including liquid oxygen) storage tanks, oxygen compressors, process oxygen main and branch pipes after liquid oxygen pump gasifiers, and other transportation and distribution networks, providing safe and stable oxygen flow for these user points.
2. Structural characteristics and working principle
2.1 The combination of valve components in this product adopts the "integrated block" mode, with a reasonable design and compact structure.
2.2 This product consists of stainless steel seamless tube, silicon brass oxygen shut-off valve, non pressure relief oxygen shut-off valve, KOSO type oxygen pressure regulating valve, reducing tee, reducing joint, 90 ° bend, and copper flame arrester.
2.3 This product has two structural forms
a、 Set up an oxygen pressure regulating valve group for an independent valve chamber, as shown in Figure 1. The valve stem of the manual regulating valve can be operated with an extended handle for safety protection from outside the protective wall.
b、 For oxygen pressure regulating valve groups with DN ≤ 125, independent valve chambers may not be required, but according to the oxygen safety technical regulations, FPV-T copper flame arresters must be installed before and after the regulating valve, with a length L9 ≥ 1500. Refer to Figure 2.
The working principle of the 2.4 valve group is that the main and branch pipes in the system are two parallel channels. When the valve group is put into operation, the pilot pressure relief oxygen shut-off valve on the branch pipe is first activated to gradually reduce the pressure difference on both sides of the valve group; When the pressure difference is equal to or less than 0.3 MPa, use the main pipe again and close the pilot pressure relief oxygen shut-off valve to avoid accidents caused by excessive gas flow rate and component heating, ensuring safe air supply.
3. Main Technical Performance Parameters of Valve Group (Design Pressure P=3.15MPa)

Pipeline diameter DN	Qma(P1=3MPa) Nm3/h	Qmin(P1=1.8MPa) Nm3/h	KOSO regulating valve diameter DNx	Pilot stop valve diameter DNx	Export oxygen pressure P2(MPa)
40	1870	1150	40	20	Oxygen point for steelmaking process P2=1.6±0.5MPa Oxygen point for continuous casting and cutting P2=1.2～1.4MPa Machine repair oxygen welding and cutting P2=0.8～1.0±0.5MPa
50	2930	1790	40	20
65	4950	3035	50	25
80	7500	4600	80	25
100	11730	7190	80	25
125	18330	11235	100	25
150	26400	16180	125	2
200	46930	28770	150	32
250	73330	44950	200	40
300	105600	64730	250	40

4. The basic structure and dimensions of the oxygen pressure regulating valve with an independent valve chamber are shown in Figure 1 and Appendix 1

1. Oxygen shut-off valve
2. Reducing tube
3. KOSO oxygen regulating valve
4. Pilot pressure relief oxygen shut-off valve
5. Oxygen filter
6. Neck welded steel pipe flange

Figure 1 Schematic diagram of oxygen pressure regulating valve group with independent valve chamber

Appendix 1

DN	40	50	65	80	100	125	150	200	250	300
L	2750	3000	3260	3260	3640	3910	4170	4510	4780	5170
I	500	500	500	500	500	500	500	500	500	500

5. Basic structure (see Figure 1) and external dimensions table (see Appendix 2) of oxygen pressure regulating valve group (DN ≤ 125) without independent valve chamber

Figure 2 Schematic diagram of oxygen pressure regulating valve group without independent valve chamber
1. Oxygen shut-off valve 2, flame arrester 3, reducer 4, KOSO oxygen regulating valve
5. Pilot pressure relief oxygen shut-off valve 6, oxygen filter 7, welded steel pipe flange with neck

Appendix 2

DN	40	50	65	80	100	125
L	5750	6000	6260	6300	6680	6870
I	155	160	175	185	200	200

6. This valve group can adopt a compact arrangement: the pilot relief shut-off valve is connected across the inlet side (in front of the regulating valve) of the first shut-off valve with a bypass hole and the outlet side of the second shut-off valve, but an oxygen shut-off valve with a bypass hole should be selected when ordering.

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