Products Description
Double Block and Bleed Ball Valves are valves with two or more sealing pairs that, in the closed position, provide a seal against pressure at both ends of the valve by venting/bleeding through the cavity between the sealing pairs.The DBB feature is the ability to isolate the two sources of pressure and vent/uniformize the pressure in the space between the two sealing elements (blocks). When two valves are used, the venting may be in the ductwork/piping, or when the valve has the DBB feature, the venting may be in the valve body between the two seats.
Sizes
API 6D / 6DSS: 1/2" through 24"
API 6A / 17D: 1-13/16" - 13-5/8"
Pressure Rating
ANSI Class: 150 - 4500
API Rating: 2000 - 20000 FOR TOP ENTRY
End Connections
ANSI Flanges: ANSI B16.5/ ANSI B16.47 (Series A or B)
API Flanges: API 6A (6B-6BX)/ API 17D (17SS-17SV)
Compact Flanges: NORSOK L-005
Special Flanges: SAE J518C; ISO 6162; ISO 6164 or designed to suit customer specification.
Hubs: All major hub end design available
Welding Ends: Butt or Socket Welding Ends with or without pup pieces
Threaded Ends: NPT
Dimensions
|
Ball valve Type |
Flow rate |
NPS full bore |
NPS reduced bore |
|
D1 |
Class 150 to 800 Lbs |
1/8" to 1" 1/2 |
1/2" to 2" |
|
D2 |
Class 900 to 1500 |
1/8" to 1" 1/2 |
1/2" to 2" |
|
D3 |
Class 2500 and above |
1/8" to 1" 1/2 |
1/2" to 2" |
|
D4 |
Up to Class 300 |
2″ to 4″ |
3″ to 6″ |
|
D5 |
Up to class 2500 |
2″ to 10″ |
3″ to 12″ |
|
D6 |
Up to class 2500 |
Above 10″ |
Above 12″ |
GNEE Team Show
GNEE Customers
FAQ
Q1: Is the requirement for MOQ?
A1: For some small size, like 2''-48''(DN50-DN1200), it request the MOQ is 50pcs for each size. Generally speaking, it depends on your order.
Q2: How about the warranty?
A2: The warranty time is 18 months after leaving our factory. We can repair or change because of the quality problems.
Q3: Payment
A3: Mainly T/T, Western Union & PayPal are applicable for us. Payment Term: 30% prepayment, 70% balance paid before shipping or against copy of BL.
Q4: Can you manufacture different standards valves according to customer requirements?
A4: Yes. We can manufacture API,DIN,GOST,JIS standards for different pressure & temperature & size according to different needs.
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