Ram Seal
Bottom Outlet Valves

The primary application of the Ram-Seal flush bottom outlet valve is used to quickly drain fluids from tanks or reactors. Their use has been been expanded into areas with high viscous fluids, gases, slurries, and powders. In addition to draining they can be used in reverse flow, injection and sampling applications and areas where positive shut-off (zero leakage) are required.

Ram-Seal Valve With Electric Actuator (2)-Picsart-BackgroundRemover (1) (1)

Ram-Seal Valve - Characteristics

The ram-seal drain valve is a free flowing, full opening valve design that offers bubble tight Class VI sealing characteristics that ensures positive shut off to process. In laboratory tests Ram-Seal valves have exceeded all Class requirements and delivered positive shut off over several hours of testing. The design ensures:

Clog Free Performance - automatic rodding on every stroke
Flow in either direction - can be used to drain or inject media without damage to the sealing mechanism
High Cv - 45 degree branch assures rapid drainage, unobstructed by valve stems, restricted ports or unnecessary change in flow direction
No leaks - achievement of absolute zero leakage
Extended seal life - as the seal is not in the flow path
Diverse Low emissions packing designs are available

This unique and superior performance explains why this bottom outlet valve is widely used in the Chemical and Petrochemical industries in diverse applications. This includes most polymer applications...polyester, polyethylene, HDPE, PTA, Polystyrene, Catalysts, DMT, TDI, MDI to name a few.

Their reliable performance and dependable sealing means that they are also used in severe services including radioactive waste and mineral processing applications.

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Features Dimensions Connection Types Actuation & Accessories Reference Customers

The Ram-Seal Principle

The Ram-Seal® valve works by having a plunger (Ram) operating within a cylinder. When the valve is closed the plunger (Ram) occupies the entire inner bore in the valve body leaving minimal space for particles to collect.

The primary sealing is provided by a resilient seal ring mounted on the Ram. It travels with the Ram throughout the stroke. It seals when the seal ring receives a thrust force from a compression ring as the Ram moves to the closed position. The seal ring is expanded into a wide band seal against the surface of the sealing barrel (Seat) and against the Ram.

In the open position the seal ring is retracted out of the flow stream hereby being protected from abusive forces from flow and velocity. The wear on the seal ring is minimized as the sealing contact occurs only while the Ram travels the short distance of the seating area

Features

Fetterolf piston drain valves are available with several basic design options:

½ inch (DN 15) to 24 inch (DN 600)
ASME 150# (PN10) to ASME 2500# (PN 200) asstandard
45, 60, or 90 degree branch outlet angle
Custom connections to fit vessel pad - dead space free
LeakTight Shut-Off to Class VI
Adjustable stuffing box seal to atmosphere
Extended body or plunger
Electric, hydraulic, pneumatic or manual
actuation

Drawings & Dimensions

The Ram Seal valve is a flush bottom outlet valve with a standard 45 degree outlet angle that optimises flow and Cv. In addition to zero leakage, Fetterolf Ram Seal valves provide clog free drainage in viscous, slurry or abrasive service. The stem is swallowed by the ram, thus ensuring a more compact build. The ram cleans the valve body and nozzle with every stroke.

The Ram Seal comes with a deep stuffing box or gland that assures no leakage to atmosphere as standard. Many stuffing box designs or packing arrangements are available to meet specific media or low emissions requirements.

A manual actuator is shown, but the Ram-Seal can be provided with pneumatic, air motor, hydraulic or electric actuation.

STANDARD RAM-SEAL® DIMENSION TABLE (ASME 150#)
Size	Port	RF to Branch	Branch Length	Valve Length	Hand Wheel	S Min	Inlet Flanges	Branch Flanges
Size	B (in/mm)	C (in/mm)	D (in/mm)	L (in/mm)	HW ØDIA (in/mm)	S (in/mm)	J (in)	K (in)
1"	0.94 / 24	2.24 / 57	8.23 / 209	20.38 / 518	6.30 / 160	1.25 / 33.4	1", 1.5", 2", 2.5" ASME	1" ASME
1.5"	1.19 / 30	2.56 / 65	10.31 / 262	23.50 / 597	8.86 / 225	1.59 / 40.7	1.5", 2", 2.5", 3" ASME	1.5" ASME
2"	1.69 / 43	2.56 / 65	11.54 / 293	25.25 / 641	8.86 / 225	2.26 / 61.4	2", 2.5", 3" ASME	2" ASME
3"	2.56 / 65	3.11 / 79	13.15 / 334	29.25 / 743	8.86 / 225	3.50 / 89	3", 4" ASME	3" ASME
4"	3.19 / 81	3.11 / 79	15.47 / 393	34.25 / 870	14.17 / 360	4.00 / 101.6	4" ASME	4" ASME
6"	5.13 / 130	3.43 / 87	18.54 / 471	46.50 / 1181	19.69 / 500	6.25 / 166.5	6" ASME	6" ASME
8"	7.13 / 181	4.09 / 104	20.79 / 528	47.75 / 1213	19.69 / 500	8.75 / 213	8" ASME	8" ASME
10"	9.25 / 235	6.97 / 177	28.46 / 723	65.25 / 1657	32.00 / 813	10.38 / 265	10" ASME	10" ASME

Connection Types & Options

Fetterolf valves can be provided as flanged, threaded, or with weld ends. They are most commonly provided with extended body to minimize dead space, but flush body or extended plungers are more suitable for certain applications.

Extended Body

Flush Body

Extended Plunger

Options include contoured extended body or plunger, or a loose seat to provide mounting flexibility.

Loose Seat

Contoured Extended Body

Contoured Extended Plunger

For certain pipeline applications, our drain or sampling valves can be provided with a core pipe construction which can be welded or flanged into the pipeline. For viscous services where free fluid flow is required, our valves can be provided with a heating jacket.

Core Pipe

Jacketed Body

Actuation & Accessories

Fetterolf offers many types of actuation from manual gearbox to electric actuation. We can advise you of the most appropriate solution depending on various factors, such as speed to operate, safety, and available plant facility infrastructure to name a few.

If you have a preferred vendor we can, in most cases, accommodate your preference. Likewise we can provide all the necessary components for each solution, including solenoid valves, limit switches, filter regulators, pressure switches, and junction boxes.