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Products
NON-RISING STEM SLAB GATE VALVE |
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| Product name：NON-RISING STEM SLAB GATE VALVE |
| Item：NSSGV001 |
| Details： |
SLAB GATE VALVE (NON-RISING STEM)
The Non-rising stem slab gate valves manufactured by Top Wellhead Equipment Co., Ltd. are available in temperature classes L, P, R, S, T, and U specified in API 6A. Gate valves to be used in the 350℉ or 650℉ high temperature can be supplied on request. Gate valves manufactured by our company are available in 3000psi, 5000psi and 10000psi working pressure, nominal size from 1-13/16" through 4-1/16",material classes from AA through FF, product specification levels (PSL) from 1 through 3 and performance requirement (PR) 1.
SPECIFICATION:
● Manufactured and Tested in Accordance with API Spec 6A
●Simple structure and renewable gate and seat assembly.
●One-piece and double-acting gate with long service life.
●Both thrust bearings with large load capacity and composite rubber-plastic stem lip packing minimize operational torque.
●Bearing cap is provided with a grease cup to make it easy to inject lubricating grease in the field.
●Threaded packing gland allows removal of bearings and stem packing under line pressure.
●Both the bolted bonnet and modern bonnet seal ring provide simple structure and reliable sealing.
●The sealing surfaces of the gate and seat are hardfaced for wear and corrosion resistance.
●Wave springs are installed between the body and seat and between the gate and seat. The gate and seat still maintain a positive metal to metal seal under low pressure.
●Floating gate design requests the hand wheel to be backed off 1/4 turn after its rotation can go no further.
Note:
Under pressure, the valve is forbidden to be semi-shrouded, for it will do great harm to the gate valve and great reduce the service life of the valve.
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| PARTS LIST |
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Item
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Description
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Qty
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Material
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Remark
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1
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Body
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1
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4130
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*2
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Seat
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2
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4130+HF
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*3
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Seat Seal Ring
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4
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NBR
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*4
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Wave Spring
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2
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410
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*5
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Gate
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1
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4130+HF
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*6
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Stem Screw
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1
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Steel
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*7
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Stem
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1
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410
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*8
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Bonnet Seal Ring
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1
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Steel
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9
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Bonnet
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1
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4130
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*10
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Grease Screw
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1
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Assy.
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11
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Bonnet Stud
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8
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4140
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12
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Bonnet Nut
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8
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5140
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*13
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Stem Seal Assy.
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1
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Assy.
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14
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Packing Gland
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1
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Steel
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*15
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Bearing
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2
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Assy.
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16
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Bearing Bushing
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1
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Steel
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*17
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Sec. Seal
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1
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NBR
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18
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Screw Housing
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1
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Steel
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19
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Lock Screw
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1
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Steel
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*20
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Lube Fitting
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1
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Assy.
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21
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Hub Assy.
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1
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Steel
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22
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Washer
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1
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Steel
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23
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Lock Nut
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1
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Steel
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*Major Repair------─ One Each For One Year’s Service |
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