SOUTHERN MANUFACTURING GROUP


China Representative： ESSENTEC ENGINEER ING SOLUTION CO.LTD
Add：Room 511 ,Dragon pearl Complex,No.2123 龙珠广场511室Pudong Ave,Shanghai,China PC：200135
FAX：+86 -21-68552596
Tel：+86 -21-68552597
Site：WWW.essentec.com.cn

◆ APPLICATION
Permaseal? Plug Valves are designed for on-off and diverting applicatjons in the chemical,power,mining and paper industries.They are designed to handle clean , viscous and corrosive liquids;clean and corrosive gases;and low pressure steam.
The unique design of Southern Manufacturing Group,s Permaseal Plug Valve include a nonlubri
cated,tapered plug and two individual seats that provide a double seal and bi-directional shutoff.Ranging in sizes from 0.5-6"(15-150mm),they offer corrosion resistance and temperature ratings to C).Pressure rating include ANSI Class 150 for applications to 285 psi(1960kPa)and ANSI Class 300 for services to 740 psi(5100kPa).
Permaseal PLUG Valves are available in 316 stainless steel,catbon steel,Alloy 20,Monel,Hastelloy C ,INCONEL，TITANIUM，PALLADIUM，ZIRCONIUM and other materials.
Several body designs are available for various process applications including two-way,threeway,jacketed,flush-through and double block and bleed valves .The Permaseal Plug Valve is also available with modified construction for chlorine service and bellows stem seals for controlling fugitive emissions.A variety of actuator options are available including lever,handwheel,double acting cylinder,spring return cylinder and electric motor.

◆ Automatic Flushing
The self-adjusting plug in the Permaseal Valve features a pressure relief hole in the plug that allows flushing of the lower cavity.When the valve is being opended or closed,flow is created through the pressure relief hole in the bottom of the plug and out the downstream port.Accumulation of contaminants is eliminated by this flushing action during normal valve actuation.

◆ Seat Wear Indicator
The position stop plate provides external indication of seat wear.As the seats wear,the stop plate moves closer to the valve cover.Operators can easily determine when contact is made,indicating the seats should be replaced.

◆ Seat Wiping Action
Wiping action of the plug on the raised seats prevents the build-up of material that can cause excessive wear and shorten life..This is especially beneficial in crude oil application that contain sand or other entrained material.
PERMASEAL? PLUG VALVES 。

◆ Self-Adjusting Plug Compensates for Wear
Compressed Belleville washers provide positive contact between the tapered plug and the seats.The Belleville washers are located between the plug and the bonnet,distributing a constant thrust on the plug to compensater for seat wear,thermal expansion and contraction.The Permaseal design does not rely on line pressure for tight sealing.

◆ Dynamic Stem Seal Assures Long Life and Reduce Maintenance
Thrust from the Belleville washers provides a live-loaded,self-adjusting stem seal.Uniform pressure on the multiple ring packing continuously adjust for wear to assure a long-life stem seal and reduced maintenance.

◆ Top Entry Design Allows Ease of Maintenance
Top entry design allows periodic mainterial to be performed with minimum downtime required for disassembly and reassembly.Top entry design also means the seats can be replaced without removing the valve from the line.Using common hand tools,worn seats can be removed and new seats inserted in as little as ten minutes.

◆ Self-Aligning Double Seat Seals Both Ports Simultaneously
The tapered plug design provides automatic self-alignment of the two separate seats.The unique seat design,combined with the self-adjusting plug,seals both ports at the same time and provides bi-directional shutoff to full ANSI rating. Here the valve can be flushed and it won,t affect the systemic function.

◆ High Flow Capacity Minimizes Turbulence

Straight-though flow and a large port minimize turbulence and pressure loss.

◆ Lower Torque Allows Use of Smaller Actuators
Because the Permaseal plug contacts only the seats and not the body walls,torque is much less than a sleeved or lined valve.The lower torque allows the use of smaller,less expensive actuators.Permaseal Plug Valves are available with cylinder or electric motors,all actuator top mounting pads/adapter brackets are compatible with the ISO 5211/1 standard.

◆ Bellows Stem Seal Provides Zero Leakage in Critical Applications
Permaseal Plug Valves are available with a secondary packing chamber.In addition to the redundancy of dual stem seals and the advantages they provide,the secondary chamber also provides a sensing port that can be used to:
Contain emissions and detect with an analyzer.
Detect pressure changes as indication of leakage.
Pump sealants into the lantern ring area to effectively seal a leak in the primary packing.
Pressurize the chamber with inert gas to balance system pressure.
Vent emissions to flare stack.
Where zero leakage must be maintained,Permaseal can provide a hermetic bellows stem seal.

◆ Jacketed Valves

Permaseal Plug Valves can be specified with full,partial or bolt-on jackets.

◆ The materials of the valves are compatible with the NACE MR-01-75 standard. Plug ,body,seat and Belleville washers materials can be selected at will.