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Ram Blowout Preventers (API-16A)

We supply Shaffer LWP, LWS, SL/SLX, LXT style, and Cameron type U style ram blowout preventers; their sizes, models and technical specifications are in the following tables. Our blowout preventers are manufactured in accordance with API Specification 16A, Third Edition and NACE MR0175 per API Specification 16A, Temperature T20. They meet the applicable API and NACE requirements for H2S service.

LWS double ram BOPType U double ram BOP

  Ram BOP Sizes and Models

Working Pressure, psi
Bore Size (inches)
7-1/16
9
11
13-5/8
16-3/4
18-3/4
20-3/4
21-1/4
26-3/4
15,000
                 
10,000
                 
5,000
                 
3,000
                 
2,000
                 
 

  Shaffer Style (LWP, LWS, SL/SLX) Ram BOP Specifications*

Bore (inches)
7-1/16
9
11
13-5/8
20-3/4
21-1/4
Working Pressure (psi)
5,000
10,000
3,000
5,000
3,000
5,000
10,000
3,000
5,000
10,000
3,000
2,000
Length (inches)
58-1/4
79
60
79-1/8
72-5/8
89-1/4
122-3/4
130-1/4
130-1/4
128-3/4
127-1/2
127-1/2
Width (inches)
21-1/2
30
21-1/2
23-1/16
25-15/16
28-3/4
38-9/16
40-3/4
40-3/4
43-1/16
41-1/4
40-7/8
Height (inches), Single, Stud x Stud
15
22-7/8
11-1/8
14-1/2
14-1/2
19-1/2
23-1/2
17-1/4
17-1/4
28
23-1/8
23-1/8
Height (inches), Double, Stud x Stud
26-3/4
36-5/8
22
29-1/2
29-3/8
33
40-7/8
34
34
46
49-1/4
44-7/16
Weight (lbs),
Single, Stud x Stud
1,385
5,550
1,170
2,870
2,116
4,150
11,100
8,400
8,800
13,200
7,448
7,285
Weight (lbs),
Double, Stud x Stud
2,504
9,900
2,200
5,750
4,096
7,725
20,560
15,350
15,620
23,400
14,615
14,455
Gallons to Open
1.18
2.34
0.68
2.27
1.45
2.62
7.0
4.46
4.46
10.52
4.46
4.46
Gallons to Close
1.45
2.72
0.77
2.58
1.74
2.98
9.45
5.44
5.44
10.58
5.07
5.07
Closing Ratio
5.45:1
7.11:1
4.5:1
5.57:1
5.45:1
5.57:1
7.11:1
5.54:1
5.54:1
7.11:1
5.57:1
5.57:1

   *This is only a partial listing of our ram blowout preventers. Data in this table are for reference only.

  Type U Style Ram BOP Specifications*

Bore (inches)
7-1/16
11
13-5/8
20-3/4
21-1/4
Working Pressure (psi)
5,000
10,000
3,000
5,000
10,000
15,000
3,000
5,000
10,000
15,000
3,000
2,000
Length (inches)
74
74
95.25
96.25
96.25
124
112.13
112.13
114.13
139.00
143.69
143.69
Width (inches)
20.25
20.63
25.13
25.13
25.75
32
29.25
29.25
30.25
39.50
39.52
39.52
Height (inches), Single,
Flange x Flange
27.50
30.56
29.06
34.31
35.69
44.81
31.31
33.81
41.69
53.69
40.56
37.9
Height (inches), Double,
Flange x Flange
44.19
48.63
49.25
54.50
55.88
69.75
53.38
55.88
66.63
81.75
66.13
62.75
Weight (lbs),
Single,
Flange x Flange
2,800
3,550
5,300
5,600
6,400
10,300
7,200
7,700
10,300
23,700
13,650
13,250
Weight (lbs),
Double,
Flange x Flange
5,200
6,400
9,900
10,200
11,300
18,400
14,300
14,800
18,400
43,250
25,550
25,150
Locking Screw Turns (Each End)
18
18
27
27
27
32
32
32
32
45
46
46
Gallons to Open
1.3
1.3
3.4
3.4
3.4
5.7
5.5
5.5
5.5
10.4
8.1
9.0
Gallons to Close
1.3
1.3
3.5
3.5
3.5
5.8
5.8
5.8
5.8
10.6
8.7
8.7
Closing Ratio
6.9:1
6.9:1
7.3:1
7.3:1
7.3:1
9.8:1
7.0:1
7.0:1
7.0:1
10.6:1
7.0:1
7.0:1

   *This is only a partial listing of our ram blowout preventers. Data in this table are for reference only.

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