Neck Flange Check Valve NRVD Type

Neck Flange Check Valve NRVD Type is mainly used in the pipeline which only allows the medium to flow in one direction and prevents the reverse flow. Under the action of the fluid pressure flowing in one direction, the valve disc opens; when the fluid flows in the opposite direction, the fluid pressure acts on the valve seat to seal, thus cutting off the flow.

Applicable Medium: R12, R22, R502, R134a, R404A, R507, R717 and other refrigerants.

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Product Information

Neck Flange Straight Check Valve

Technical Parameter

Nominal Diameter: DN25-DN150;

Nominal Pressure: 2.5MPa;

Applicable Medium: R12, R22, R502, R134a, R404A, r507, R717 and other refrigerants.

Applicable Temperature: - 50 ℃ ~ + 150 ℃;

Opening Pressure Difference: 0.04bar

Neck Flange Check Valve
Type	Nominal Diameter (DN)	Size(mm)
		φA	φB		φC	φD	φE	L1	L2
			A口	B口
NRVD	25	25	33.7	32	68	115	85	65	145
	32	32	42.4	38	78	140	100	65	149
	40	40	48.3	45	88	150	110	70	160
	50	50	60.3	57	98	165	125	80	176
	65	65	76.1	76	120	185	145	90	192
	80	80	88.9	89	138	200	160	100	216
	100	100	114.5	108	160	235	190	114	244
	125	125	139.7	133	188	270	220	124	260
	150	150	168.3	159	218	300	250	144	294