Needle Valves - Öz-Kan Makina

Application Areas

Design Properties

Material Properties

Sizes

Types of Needle Valves

Needle Valve User Manual

Application Areas

Bottom outlets
Reservoir inlets
Flow control
Pipe burst safety valve
Treatment plant flow control
Pressure regulating
Turbine by-pass

Design Properties

1. Optimized body design for better flow guiding, minimum head losses in full open position

2. Single piece compact body

3. Maximum service life due to the cavitation-free location of seal ring

4. Drive shaft supported on both sides in self-lubricating, maintenance free bushings

5. Stainless steel internal parts and fittings

6. Wear and corrosion resistant, bronze weld overlay-finished piston guides

7. Double O-ring sealed shaft

8. Optional control devices for optimum cavitation-free control requirements

9. Without special tool requirement field replaceable seat and seal ring

10. Fusion Bonded Epoxy coating

The piston and crank mechanism are located in teardrop shaped internal body.

The piston is axially guided inside the internal body and linear movement of piston changes cross-section. The piston is driven by crank mechanism which transforms rotational movement of gearbox or other actuation devices to linear movement.

Material Properties

PART NO	DESCRIPTION	MATERIAL
1	Body	Ductile iron EN-GJS-400-15
2	Piston	Stainless steel 1.4301
3	Seal	Rubber NBR
4	Hex. Socket head cap screw	Stainless steel A2
5	Cap	Ductile iron EN-GJS-400-15
6	Connecting rod	Stainless steel1.4021
7	Piston hub	Stainless steel 1.4301
8	Bearing bush	Bronze G-Cu Sn12
9	Key	Stainless steel1.4021
10	Crank	Ductile iron EN-GJS-400-15
11	Crank pin	Stainless steel 1.4021
12	Circlip	Stainless steel 1.4301

PART NO	DESCRIPTION	MATERIAL
13	Bearing bush	Bronze G-Cu Sn12
14	Seat ring	Stainless steel 1.4301
15	Shaft bearing bush	Bronze G-Cu Sn12
16	Bearing bush	Bronze G-Cu Sn12
17	Nut	Stainless steel 1.4301
18	Seal ring	Rubber EPDM
19	Retaining ring	Stainless steel 1.4301
20	Shaft	Stainless steel 1.4021
21	Cover	Ductile iron EN-GJS-400-15
22	Hex. bolt	Stainless steel A2
23	Worm gear box	-0
24	Hand wheel	-0

Sizes

DN	L	L1	L2	e1	e2	e3	e4	e5	Ød2	h1	h2	h3
200	400	140	200	445	188	312	95	158	245	198	163	239
250	450	170	230	480	200	357	95	158	245	235	163	239
300	500	200	250	518	230	395	95	158	245	268	163	239
350	550	240	280	558	260	435	95	158	245	300	163	239
400	600	270	300	656	296	471	110	175	370	340	184	271
450	650	300	330	695	330	510	110	175	370	353	184	271
500	750	340	380	736	370	551	110	198	370	388	285	372
600	900	400	450	821	440	636	156	245	370	455	334	420
700	1050	470	530	908	510	723	190	313	370	520	397	484
800	1200	540	600	978	580	793	190	313	370	590	397	484
900	1350	600	680	1048	655	863	190	313	370	670	397	484
1000	1500	670	750	1131	730	946	242	365	370	750	432	519
1200	1800	800	900	1277	865	1092	242	365	370	880	432	519
1400	2100	940	1050	1442	1015	1257	242	365	370	1030	432	519
1600	2400	1070	1200	1680	1153	1437	290	515	485	1180	538	625

Combined Check Needle Valves

Hydraulically operated Check Needle Valves are project-specific valves developed for use in high flow and pressure pump applications and turbine by-pass systems, which can react quickly when necessary, preventing the pump from being damaged during start-up and the equipments being damaged in sudden stops.
These valves also have a fast opening and closing feature. The hydraulic drive system is designed in order to have the most efficient operation of the valve according to the application conditions of the pipelines.