Adjustable chokes DR and DRP

Adjustable chokes (DR and DRP) are designed for handling a well or pipeline.
Components of choke DR required for regulation of oil well products consumption (rod header and liner – jet) are made of wear proof and corrosion – resistance materials.

Choke DRP as against choke DR regulates a flow of operating Medium by shut-down of holes equally spaced along the line and diameter in holed cylinder (cage) with cylinder piston. DRP shall be recommended in case of supernormal consumption and pressure difference of Medium. DRP choke structure enables plugging Medium flow through double (rigid and elastomeric) seal and smoothly regulates Medium consumption within the range of nominal inside diameter with control on-scale.

Technical characteristics

Symbol	DN		PN		Diameter of adjustable undersize	H	H1	L	D	Connection size
Symbol	mm	inch	MPa	psi	mm	mm	mm	mm	mm	Connection size
ДР-50х70ХЛ	50	21/16	70	10000	n.e. 25	805	298	225	200	GOST 28919
ДР-65х14ХЛ-Ф	65	29/16	14	2000	n.e. 25	597	187	167	195	RD 26-16-40
ДР-65х21ХЛ	65	29/16	21	3000	n.e. 25	620	210	190	245	GOST 28919
ДР-65х21ХЛ-Ф	65	29/16	21	3000	n.e. 25	610	200	180	195	RD 26-16-40
ДР-65х35ХЛ	65	29/16	35	5000	n.e. 25	610	200	180	245	GOST 28919
ДР-65х70ХЛ	65	29/16	70	10000	n.e. 25	790	298	225	230	GOST 28919
ДРП-65х21ХЛ-Ф	65	29/16	21	3000	n.e. 25	656	200	180	195	RD 26-16-40
ДР-80х21ХЛ	80	31/8	21	3000	n.e. 50	790	298	225	242	GOST 28919
ДР-80х35ХЛ	80	31/8	35	5000	n.e. 50	790	298	225	265	GOST 28919
ДРП-100х1,6ХЛ	100	41/16	1,6	232	n.e. 60	664	180	160	215	GOST 28919
ДР-100х21ХЛ	100	41/16	21	3000	n.e. 75	885	296	264	292	GOST 28919
ДР-100х35ХЛ	100	41/16	35	5000	n.e. 75	1008	320	260	310	GOST 28919