Special Seat Eccentric Ball Valve

• Temperature: Low Temperature
• Certification: GS, CE, ISO9001
• Media: Gas, Oil, Water, Acid
• Standard: Standard
• Connection Mode: Flange
• Power: Pneumatic
• Model NO.: HT-control valve
• Material: Stainless Steel
• Type: Self-Operated
• Transport Package: Wooden
• Trademark: HUATAO
• Origin: China
• Production Capacity: 500 Sets/Months

Product Description

Special Seat Eccentric Ball Valve

Features

The double eccentric design that stem axis deviates from both spherical cap and the center of valve body with a structure of spherical surface linear seal, which makes the sealing pair moving in a cam in the course of open-close operation of the valve, and the effect is realized that the sealing pair is separated when the spherical cap opens, and the pair is sealed when the cap closes. Greatly reducing the opening resistance moment, decreasing extrusion abrasion and prolonging the useful life of seat.

As a result of the structure design of using fixed ball, most of stresses are eliminated promptly on the valve body and line pipe and other stresses acted on the stem is dispelled on the upper and lower axle sleeves of the stem when a super pressure of upstream medium acts on spherical cap, and therefore the useful life of the valve is extended.

The special patented seat referenced the principle of flow characteristic of cage throttle orifice provides choices of orifices on the seat with different characteristics which avoids many disadvantages that orificing will be carried out in terms of flow characteristic of the valve plug opening, thus not only guaranteeing the control performance of valve, but also prolonging the useful life of valve.
 
The seat adopts a special design, when the valve acts, it can scrape off particles clung on spherical cap for preventing the scratch on sealing face from foreign matter, and the sharp edge can cut off coking or agglomerate. It can do both self-cleaning and avoiding valve plug jammed.
 
The rotation of eccentric spherical cap adopts the structure of double axle sleeves, with high mechanical stability and minimized starting torque, which ensures the valve with excellent sensitivity and induction speed.

Specifications:

1.Type of Valve Body: straight-through casting/forged eccentric ball valve
2.Nominal Pressure: PN16,PN25,PN40,PN50,PN64, etc.
3.Pressure Rating: ANSI Class150,300
4.Nominal Dia.:DN25~400; Port: 1″~16″
5.Valve Body Material: WCB,CF8(304),CF8M(316),CF3M(316L), etc.
6.Stem Material:304,316,17-4PH,316L, etc.
7.Plug Material: CF8,CF8M,CF3M(316L), reinforced ceramics, etc.
8.Material, Seat and Fixed Loop: PTFE,304,316,316L,reinforced ceramic, etc.
9.Hardening Treatment: overlay STL, surface hardening tungsten carbide, carborundum, etc.
10.Working Temperature :soft seal for -20~+250ºC; hard seal for -45~+450ºC 
11.Leakage Class: soft seal for ANSI Class VI; hard seal for ANSI Class V and Class VI

Product Parameters

N (mm)		20				25			32				40				50
Seat diameter (mm)		10	12	15	20	15	20	25	15	20	25	32	20	25	32	40	25	32	40	50
Flow Coefficient (Kv)	straight line	3	4	4.5	9	4.5	9	15	4.5	9	20	30	9	20	30	40	20	30	40	70
	equal percentage	2.5	3.5	4	8	4	8	13	4	8	17	25	8	17	25	36	17	25	36	60
Pneumatic actuators are usually configured		HTZ-150									HTZ-210
Head		10/16mm									16/25mm
Air source connector		RC1/4"
Air supply takeover		φ8×1 stainless steel pipe
Electric actuators are usually configured		PSL201/202			PSI20/204								PSL204/208

DN (mm)		65			80					100			125				150				200
Seat diameter (mm)		32	40	50	65	40	50	65	80		50	65	80	100	65	80		100	125	80		100	125	150	100	125	150	200
Flow Coefficient (Kv)	straight line	30	40	70	115	40	70	115	150		70	115	150	215	115	150		215	315	150		215	315	435	215	315	435	735
	equal percentage	25	36	60	100	36	60	100	135		60	100	135	190	100	135		190	280	135		190	280	410	190	280	410	650
Pneumatic actuators are usually configured		HTZ-310															HTZ-400
Head		25/40mm															40/60mm
Air source connector		RC1/4"
Air supply takeover		φ8×1 stainless steel pipe
Electric actuators are usually configured		PSL208/210								PSL210/312							PSL312/314				PSL314/320

 

Product photo