Outline

The 50F Series soft seal floating ball valve has simple structure. The ball adopts the floating structure. The single-way force acted by the medium on the ball makes the ball Move closer to one side of the PTFE seat. The sealing function is realized through extruding the seat .It is mainly used for shut-off applications in low pressure service conditions. The 50FSeries valve is an ideal product used for on-off in the pipes. Featured by compact structure, light weight, high flowing capacity, strong shut-off performance, long service life, etc., it is the best choice in steam, hydrocarbon, corrosive media and other service conditions. It has prominent performance sespecially in chemical industry, air separation, water supply system, etc.

It is an ideal choice of users.

Actuator and auxiliary control device

·Pneumatic

·Electric

·Pneumatic-hydraulic

Applications

·Chemical industry and air separation equipment

·Coal liquefaction or coal gasification

·Hydrocarbon

·Power plant

·Water supply and heat supply systems

Manufacturing range

·Size range:      DN 15"-200"

·Pressure rating:  150LB-300LB

·Connection type:  flange type

Stem sealing

·The graphite packing formed through mold pressure serves as the dynamic load seal to ensure reliable sealing and long service life.

·The high strength stem can effectively transfer torque and ensure reliable on-off of the valve.

·The stem and ball fit tightly with each other, reducing hysteresis and dead band with excellent control performance.

Seat sealing

·The seal conforms to the requirements in GB/T13927 Class D or ANSI/FCI70-2 CLASSVI.

·Reliable double-way sealing

·Excellent sealing performance in low pressure service conditions

Part name and materials

Number	Name	Material
		Stainless steel	Carbon steel	Cr-Mo steel
1	Body	ASTM A351 CF8/CF8M	ASTM A216 WCB	ASTM A217 WC6/WC9
2	Adapter	ASTM A351 CF8/CF8M	ASTM A216 WCB	ASTM A217 WC6/WC9
3	Nut	ASTM A193 Gr.8M	ASTM A193 Gr.2H	ASTM A193 Gr.2H
4	Sealing gasket		PTFE
5	Stud	ASTM A193 Gr.B8M	ASTM A193 Gr.B7	ASTM A193 Gr.B7
6	Seat		PTFE
7	Ball		ASTM A182 F304/F316
8	Stem		ASTM A564 17-4H
9	Packing gasket		ASTM A276 304
10	Packing		PTFE/ Flexible Graphite
11	Flat washer		ASTM A276 304
12	Disc spring		Inconel X-750
13	Lock nut	ASTM A193 Gr.8M	ASTM A193 Gr.2H	ASTM A193 Gr.2H
14	Cap		ASTM A276 304

Structural features of 50F Series soft seal floating ball valve

Blow-out proof stem

The stem and ball are separate. One end of the stem that is near to the ball is designed into the integral T type structure. It is protected by the upper protruded plat form on the body to ensure that the stem will not be blown out under any pressure and play the function of back seal (figure1).

Antistatic device

The antistatic device is a standard design of REOWO floating ball valves. The stem is installed with the spring grounding plunger to maintain continuous contact between the ball, stem and body and form a conduction circuit to transfer the electric charge, avoiding static electricity accumulation produced due to friction during the valve opening and closing. The static electricity accumulation is very dangerous in some service conditions.

Fire safe design

When the nonmetal seals are damaged or decomposed by high temperature in case of fire, the ball is pushed by the pressure to contact the metal lip seat and realize metal-to-metal sealing so as to shut off the fluids and minimize internal leakage. In addition, the fire safe metal seat can prevent the erosion of  the soft seal seat by the medium pressure and reduce creep deformation of the soft seal seat. All floating ball valves are designed to be fire safe and are tested and certified in accordance with API 607.